Casio Calculator FX 83GT PLUS User Manual

E
fx-83GT PLUS  
fx-85GT PLUS  
User’s Guide  
CASIO Worldwide Education Website  
CASIO EDUCATIONAL FORUM  
 
Important Information  
• The displays and illustrations (such as key markings) shown in this User’s  
Guide are for illustrative purposes only, and may differ somewhat from the  
actual items they represent.  
• The contents of this manual are subject to change without notice.  
• In no event shall CASIO Computer Co., Ltd. be liable to anyone for special,  
collateral, incidental, or consequential damages in connection with or  
arising out of the purchase or use of this product and items that come with  
it. Moreover, CASIO Computer Co., Ltd. shall not be liable for any claim of  
any kind whatsoever by any other party arising out of the use of this product  
and the items that come with it.  
• Be sure to keep all user documentation handy for future reference.  
Sample Operations  
Sample operations in this manual are indicated by a  
icon. Unless  
specifically stated, all sample operations assume that the calculator is in its  
initial default setup. Use the procedure under “Initializing the Calculator” to  
return the calculator to its initial default setup.  
For information about the , 1, B, and * marks that are shown  
in the sample operations, see “Configuring the Calculator Setup”.  
Initializing the Calculator  
Perform the following procedure when you want to initialize the calculator and  
return the calculation mode and setup to their initial default settings. Note that  
this operation also clears all data currently in calculator memory.  
(CLR)(All)(Yes)  
Safety Precautions  
Battery  
• Keep batteries out of the reach of small children.  
• Use only the type of battery specified for this calculator in this manual.  
Handling Precautions  
Even if the calculator is operating normally, replace the battery at least  
once every two years (R03 (UM-4)), or three years (LR44 (GPA76)).  
A dead battery can leak, causing damage to and malfunction of the  
calculator. Never leave a dead battery in the calculator. Do not try using  
the calculator while the battery is completely dead (fx-85GT PLUS).  
The battery that comes with the calculator discharges slightly during  
shipment and storage. Because of this, it may require replacement  
sooner than the normal expected battery life.  
Do not use an oxyride battery* or any other type of nickel-based  
primary battery with this product. Incompatibility between such  
batteries and product specifications can result in shorter battery life  
and product malfunction.  
Avoid use and storage of the calculator in areas subjected to  
temperature extremes, and large amounts of humidity and dust.  
E-2  
 
Do not subject the calculator to excessive impact, pressure, or  
bending.  
Never try to take the calculator apart.  
Use a soft, dry cloth to clean the exterior of the calculator.  
Whenever discarding the calculator or batteries, be sure to do so in  
accordance with the laws and regulations in your particular area.  
* Company and product names used in this manual may be registered  
trademarks or trademarks of their respective owners.  
Removing the Hard Case  
Before using the calculator, slide its hard  
case downwards to remove it, and then affix  
the hard case to the back of the calculator as  
shown in the illustration nearby.  
Turning Power On and Off  
Press to turn on the calculator.  
Press ꢁꢂ(OFF) to turn off the calculator.  
Auto Power Off  
Your calculator will turn off automatically if you do not perform any operation  
for about 10 minutes. If this happens, press the key to turn the calculator  
back on.  
Adjusting Display Contrast  
Display the CONTRAST screen by performing the following key operation:  
ꢁꢃ(SETUP)A(;CONT). Next, use B and C to adjust  
contrast. After the setting is the way you want, press .  
Important: If adjusting display contrast does not improve display readability,  
it probably means that battery power is low. Replace the battery.  
Key Markings  
Alternate function  
Pressing the or # key followed by a second  
sin–1 D  
key performs the alternate function of the second key.  
The alternate function is indicated by the text printed  
above the key.  
The following shows what the different colors of the  
alternate function key text mean.  
s
Keycap function  
If key marking text  
is this color:  
It means this:  
Press and then the key to access the  
applicable function.  
Yellow  
Press # and then the key to input the  
applicable variable, constant, or symbol.  
Red  
E-3  
 
Reading the Display  
The display of the calculator shows expressions you input, calculation results,  
and various indicators.  
Input expression  
Indicators  
Math  
Math  
Calculation result  
• If a indicator appears on the right side of the calculation result, it means  
the displayed calculation result continues to the right. Use C and B to  
scroll the calculation result display.  
• If a E indicator appears on the right side of the input expression, it means  
the displayed calculation continues to the right. Use C and B to scroll the  
input expression display. Note that if you want to scroll the input expression  
while both the and E indicators are displayed, you will need to press ꢂ  
first and then use C and B to scroll.  
Display indicators  
This  
Means this:  
indicator:  
The keypad has been shifted by pressing the key. The  
keypad will unshift and this indicator will disappear when  
you press a key.  
S
The alpha input mode has been entered by pressing the  
# key. The alpha input mode will be exited and this  
indicator will disappear when you press a key.  
A
M
There is a value stored in independent memory.  
The calculator is standing by for input of a variable name to  
assign a value to the variable. This indicator appears after  
you press ꢁB(STO).  
STO  
The calculator is standing by for input of a variable name to  
recall the variable’s value. This indicator appears after you  
press B.  
RCL  
The calculator is in the STAT Mode.  
The default angle unit is degrees.  
STAT  
The default angle unit is radians.  
The default angle unit is grads.  
A fixed number of decimal places is in effect.  
A fixed number of significant digits is in effect.  
Natural Display is selected as the display format.  
FIX  
SCI  
Math  
Calculation history memory data is available and can be  
replayed, or there is more data above/below the current  
screen.  
>  
The display currently shows an intermediate result of a  
multi-statement calculation.  
Disp  
E-4  
 
Important: For some type of calculation that takes a long time to execute,  
the display may show only the above indicators (without any value) while it  
performs the calculation internally.  
Using Menus  
Some of the calculator’s operations are performed using menus. Pressing  
or E, for example, will display a menu of applicable functions.  
The following are the operations you should use to navigate between  
menus.  
• You can select a menu item by pressing the number key that corresponds  
to the number to its left on the menu screen.  
• The indicator in the upper right corner of a menu means there is another  
menu below the current one. The > indicator means another menu above.  
Use A and D to switch between menus.  
• To close a menu without selecting anything, press .  
Specifying the Calculation Mode  
When you want to perform this type of  
operation:  
Perform this key  
operation:  
General calculations  
(COMP)  
(STAT)  
Statistical and regression calculations  
Generation of a number table based on an  
expression  
(TABLE)  
(VERIF)  
Verify a calculation  
Note: The initial default calculation mode is the COMP Mode.  
Configuring the Calculator Setup  
First perform the following key operation to display the setup menu:  
ꢁꢃ(SETUP). Next, use A and D and the number keys to configure  
the settings you want.  
Underlined (___) settings are initial defaults.  
MthIO LineIO Specifies the display format.  
ꢀꢁꢂꢃ  
Natural Display (MthIO) causes fractions,  
irrational numbers, and other expressions to be  
displayed as they are written on paper.  
MthIO: Selects MathO or LineO. MathO displays  
input and calculation results using the same format as they are written on  
paper. LineO displays input the same way as MathO, but calculation results  
are displayed in linear format.  
Linear Display (LineIO) causes fractions and  
other expressions to be displayed in a single  
line.  
Note: • The calculator switches to Linear Display automatically whenever  
you enter the STAT Mode. • In this manual, the symbol next to a  
sample operation indicates Natural Display (MathO), while the 1 symbol  
indicates Linear Display.  
E-5  
 
Deg Rad Gra Specifies degrees, radians or grads as the angle  
unit for value input and calculation result display.  
Note: In this manual, the B symbol next to a sample operation indicates  
degrees, while the * symbol indicates radians.  
Fix Sci Norm  
Specifies the number of digits for display of a  
calculation result.  
Fix: The value you specify (from 0 to 9) controls the number of decimal  
places for displayed calculation results. Calculation results are rounded off  
to the specified digit before being displayed.  
Example: 1 100 ÷ 7 = 14.286 (Fix 3)  
14.29 (Fix 2)  
Sci: The value you specify (from 1 to 10) controls the number of significant  
digits for displayed calculation results. Calculation results are rounded off to  
the specified digit before being displayed.  
Example: 1 1 ÷ 7 = 1.4286 s 10–1 (Sci 5)  
1.429 s 10–1 (Sci 4)  
Norm: Selecting one of the two available settings (Norm 1, Norm 2)  
determines the range in which results will be displayed in non-exponential  
format. Outside the specified range, results are displayed using exponential  
format.  
Norm 1: 10–2 |x|, |x| > 1010 Norm 2: 10–9 |x|, |x| > 1010  
Example: 1 1 ÷ 200 = 5 s 10–3 (Norm 1)  
0.005 (Norm 2)  
Aab/c Ad/c Specifies either mixed fraction (ab/c) or improper  
fraction (d/c) for display of fractions in calculation results.  
ASTAT ON ; OFF Specifies whether or not to display a FREQ  
(frequency) column in the STAT Mode Stat Editor.  
ARdec ON ; OFF Specifies whether or not to display calculation  
results using recurring decimal form.  
ADisp Dot ; Comma Specifies whether to display a dot or  
a comma for the calculation result decimal point. A dot is always displayed  
during input.  
Note: When dot is selected as the decimal point, the separator for multiple  
results is a comma (,). When comma is selected, the separator is a  
semicolon (;).  
A;CONTꢀ  
Adjusts display contrast. See “Adjusting Display  
Contrast” for details.  
Initializing Calculator Settings  
Perform the following procedure to initialize the calculator, which returns the  
calculation mode to COMP and returns all other settings, including setup  
menu settings, to their initial defaults.  
(CLR)(Setup)(Yes)  
E-6  
 
Inputting Expressions and Values  
Basic Input Rules  
Calculations can be input in the same form as they are written. When you  
press the priority sequence of the input calculation will be evaluated  
automatically and the result will appear on the display.  
4 s sin30 s (30 + 10 s 3) = 120  
ꢀꢁꢂꢃ  
4
Q30ꢊ  
3010  
3ꢊꢂ  
1
*
2
3
*
*
*1 Input of the closing parenthesis is required for sin, sinh, and other functions  
that include parentheses.  
*2 These multiplication symbols (s) can be omitted. A multiplication symbol  
can be omitted when it occurs immediately before an opening parenthesis,  
immediately before sin or other function that includes parentheses,  
immediately before the Ran# (random number) function, or immediately  
before a variable (A, B, C, D, E, F, M, X, Y), P or e.  
*3 The closing parenthesis immediately before the operation can be  
omitted.  
Input example omitting  
example.  
*2 and *3 operations in the above  
ꢀꢁꢂꢃ  
4Q303010  
3ꢂ  
Note: • If the calculation becomes longer than the screen width during  
input, the screen will scroll automatically to the right and the ; indicator will  
appear on the display. When this happens, you can scroll back to the left by  
using B and C to move the cursor. • When Linear Display is selected,  
pressing D will cause the cursor to jump to the beginning of the calculation,  
while A will jump to the end. • When Natural Display is selected, pressing  
C while the cursor is at the end of the input calculation will cause it to jump  
to the beginning, while pressing B while the cursor is at the beginning will  
cause it to jump to the end. • You can input up to 99 bytes for a calculation.  
Each numeral, symbol, or function normally uses one byte. Some functions  
require three to 13 bytes. • The cursor will change shape to I when there are  
10 bytes or less of allowed input remaining. If this happens, end calculation  
input and then press .  
Calculation Priority Sequence  
The priority sequence of input calculations is evaluated in accordance with the  
rules below. When the priority of two expressions is the same, the calculation  
is performed from left to right.  
1st  
Parenthetical expressions  
Functions that require an argument to the right and a closing  
parenthesis “)” following the argument.  
2nd  
Functions that come after the input value (x , x , x , x!, °’ ”, °, r, g,  
2
3
–1  
3rd  
4th  
%), powers (x9), roots ()  
Fractions  
E-7  
 
Negative sign (–)  
Note: When squaring a negative value (such as –2), the value  
being squared must be enclosed in parentheses (27;  
2
). Since x has a higher priority than the negative sign,  
5th  
inputting 27would result in the squaring of 2 and then  
appending a negative sign to the result. Always keep the priority  
sequence in mind, and enclose negative values in parentheses  
when required.  
6th  
7th  
8th  
9th  
STAT Mode estimated values (K, L, K1, K2)  
Multiplication where the multiplication sign is omitted  
Permutation (nPr), combination (nCr)  
Multiplication, division (s, ÷)  
10th Addition, subtraction (+, –)  
Inputting with Natural Display  
Selecting Natural Display makes it possible to input and display fractions and  
2
3
−1  
certain functions (log, x , x , x9, , , , x , 109, e9, Abs) just as they  
are written in your textbook.  
2 + 2  
'
ꢀꢁꢂꢃ  
1 + 2  
'
2ꢌ  
2CC1ꢌ  
2ꢂ  
Important: • Certain types of expressions can cause the height of a  
calculation formula to be greater than one display line. The maximum  
allowable height of a calculation formula is two display screens (31 dots s 2).  
Further input will become impossible if the height of the calculation you are  
inputting exceeds the allowable limit. • Nesting of functions and parentheses  
is allowed. Further input will become impossible if you nest too many functions  
and/or parentheses. If this happens, divide the calculation into multiple parts  
and calculate each part separately.  
Note: When you press and obtain a calculation result using Natural  
Display, part of the expression you input may be cut off. If you need to view  
the entire input expression again, press and then use B and C to  
scroll the input expression.  
Using Values and Expressions as Arguments  
(Natural Display only)  
A value or an expression that you have already input can be used as the  
7
argument of a function. After you have input  
7
, for example, you can make  
6
it the argument of , resulting in  
.
'
6
7
7
To input 1 +  
and then change it to 1 +  
'
6
6
ꢀꢁꢂꢃ  
176  
BBBBꢁ)(INS)  
E-8  
ꢀꢁꢂꢃ  
 
ꢀꢁꢂꢃ  
As shown above, the value or expression to the right of the cursor after  
ꢁ)(INS) are pressed becomes the argument of the function that is  
specified next. The range encompassed as the argument is everything up  
to the first open parenthesis to the right, if there is one, or everything up to  
the first function to the right (sin(30), log2(4), etc.)  
This capability can be used with the following functions: , ,  
(), ꢁ:(), ꢁ7(),  
, , ꢁ  
(), .  
Overwrite Input Mode (Linear Display only)  
You can select either insert or overwrite as the input mode, but only while  
Linear Display is selected. In the overwrite mode, text you input replaces the  
text at the current cursor location. You can toggle between the insert and  
overwrite modes by performing the operations: ꢁ)(INS). The cursor  
appears as “I” in the insert mode and as “ ” in the overwrite mode.  
Note: Natural Display always uses the insert mode, so changing display  
format from Linear Display to Natural Display will automatically switch to  
the insert mode.  
Correcting and Clearing an Expression  
To delete a single character or function: Move the cursor so it is directly to  
the right of the character or function you want to delete, and then press ).  
In the overwrite mode, move the cursor so it is directly under the character  
or function you want to delete, and then press ).  
To insert a character or function into a calculation: Use B and C to  
move the cursor to the location where you want to insert the character or  
function and then input it. Be sure always to use the insert mode if Linear  
Display is selected.  
To clear all of the calculation you are inputting: Press .  
Recurring Decimal Calculations  
Your calculator uses a recurring decimal when you input a value. Calculation  
results also can be displayed using recurring decimal form whenever  
applicable.  
Inputting a Recurring Decimal  
When inputting a recurrent decimal, press  
7(I) before inputting its  
period (repetend) and then input the period up to the ending value. To input  
• •  
the recurring decimal 0.909090.... (0.90), perform the following operation:  
“0 ꢎ  
7(I) 90”.  
Important: • If the value starts with an integer part (like: 12.3123123...), do  
not include the integer part when inputting the period (12.312). • Recurring  
decimal input is possible only when Natural Display is selected.  
To input 0.33333... (0.3)  
Math  
0ꢎ  
E-9  
 
Math  
Math  
7(I)  
3
To input 1.428571428571... (1.428571)  
Math  
Math  
17(I)  
428571  
To calculate 1.021 + 2.312  
Math  
Math  
17(I)021Cꢀ  
27(I)312ꢁ  
Calculation result displayed as recurring  
decimal value:  
5
Note: • You can specify up to 14 decimal places for the recurring decimal  
period. If you input more than 14 decimal places, the value will be treated as  
a terminating decimal and not a recurring decimal. • Recurring decimal value  
input can be performed regardless of the Rdec setting on the setup menu.  
Displaying a Calculation Result as a Recurring  
Decimal Value  
Calculation results that can be displayed as recurring decimal values will be  
displayed as such when ON is selected for the Rdec setting on the setup  
menu. Pressing the 5 key will cycle between the available calculation result  
formats as shown below.  
Fraction  
Recurring Decimal  
Decimal Value According to Display (Norm, Fix, Sci) Settings  
Or  
Decimal Value According to Display (Norm, Fix, Sci) Settings  
Recurring Decimal  
Fraction  
E-10  
 
1
7
= 0.142857 = 0.1428571429 (Norm 1)  
Math  
Math  
Math  
Math  
17ꢂ  
Display as recurring decimal:  
5
Decimal value according to Norm 1 setting: 5  
Return to initial display format (fraction):  
5
1
7
1 ÷ 7 =  
= 0.142857 = 0.1428571429 (Norm 1)  
Math  
Math  
Math  
Math  
17  
5
5
5
Display as fraction:  
Display as recurring decimal:  
Return to initial display format (Norm 1):  
1
7
= 0.142857 = 0.1428571429 (Norm 1)  
1
17ꢂ  
Display as recurring decimal:  
5
Decimal value according to Norm 1 setting: 5  
E-11  
 
Return to initial display format (fraction):  
5
1
7
1 ÷ 7 = 0.1428571429 (Norm 1) = 0.142857 =  
1
17ꢂ  
Display as fraction:  
5
5
5
Display as recurring decimal:  
Return to initial display format (Norm 1):  
Conditions for Displaying a Calculation Result as a  
Recurring Decimal  
If a calculation result satisfies the following conditions, pressing 5 will  
display it as a recurring decimal value.  
• The total number of digits used in the mixed fraction (including integer,  
numerator, denominator, and separator symbol) must be no more than  
10.  
• The data size of value to be displayed as the recurring decimal must be no  
larger than 99 bytes. Each value and the decimal point require one byte,  
and each digit of the period requires one byte. The following, for example,  
would require of total of 8 bytes (4 bytes for the values, 1 byte for the decimal  
point, 3 bytes for the period): 0.123  
Note: For information about switching the display format of a calculation  
result when OFF is selected for the Rdec setting on the setup menu, see  
“Toggling Calculation Results”.  
Recurring Decimal Examples  
• •  
• •  
0.3 + 0.45 = 0.78  
Math  
0ꢎ  
0ꢎ  
7(I)3Cꢌ  
7(I)455  
1.6 + 2.8 = 4.5  
Math  
1ꢎ  
2ꢎ  
7(I)6Cꢌ  
7(I)85  
E-12  
 
123  
999  
1234  
9999  
To confirm the following: 0.123 =  
, 0.1234 =  
,
12345  
99999  
0.12345 =  
Math  
Math  
Math  
Math  
Math  
Math  
123999ꢂ  
5
12349999ꢂ  
5
1234599999ꢂ  
5
Toggling Calculation Results  
While Natural Display is selected, each press of 5 will toggle the currently  
displayed calculation result between its fraction form and decimal form, its  
form and decimal form, or its P form and decimal form.  
1
6
P ÷ 6 =  
= 0.5235987756  
1
6
(P)6ꢂ  
0.5235987756  
5.913591358  
f
(
+ 2) s  
=
= 5.913591358  
'
2
'
3
'
6 + 2 3  
'
2C2ꢊ  
3'  
'
6 + 2 3  
f
While Linear Display is selected, each press of 5 will toggle the currently  
displayed calculation result between its decimal form and fraction form.  
1
5
1 ÷ 5 = 0.2 =  
1
15ꢂ  
0.2  
1Y5  
f
f
4
5
1
5
1 –  
=
= 0.2  
1
145ꢂ  
1Y5  
0.2  
E-13  
 
Important: • Depending on the type of calculation result that is on the display  
when you press the 5 key, the conversion process may take some time  
to perform. • With certain calculation results, pressing the 5 key will not  
convert the displayed value. • When ON is selected for Rdec on the setup  
menu, pressing 5 will switch the calculation result to recurring decimal form.  
For details, see “Recurring Decimal Calculations”. • You cannot switch from  
decimal form to mixed fraction form if the total number of digits used in the  
mixed fraction (including integer, numerator, denominator, and separator  
symbols) is greater than 10.  
Note: With Natural Display (MathO), pressing instead of after  
inputting a calculation will display the calculation result in decimal form.  
Pressing 5 after that will switch the calculation result to recurring decimal  
form, fraction form or P form. The form of the result will not appear in  
this case.  
Basic Calculations  
Fraction Calculations  
Note that the input method for fractions is different, depending upon whether  
you are using Natural Display or Linear Display.  
2
3
1
2
7
6
7
6
2  3C1 2ꢁ  
+
=
7
6
or  2A3C1A2ꢁ  
1
2  31 2ꢁ  
7Y6  
1
2
1
2
1
2
4()3C1A2ꢁ  
=
4 − 3  
1
4312ꢁ  
1Y2  
Note: • Mixing fractions and decimal values in a calculation while Linear  
Display is selected will cause the result to be displayed as a decimal value.  
• Fractions in calculation results are displayed after being reduced to their  
lowest terms.  
To switch a calculation result between improper fraction and mixed  
fraction form: Perform the following key operation: 5(  
)
To switch a calculation result between fraction and decimal form:  
Press 5.  
Percent Calculations  
Inputting a value and pressing (%) causes the input value to  
become a percent.  
150 s 20% = 30  
Calculate what percentage of 880 is 660. (75%)  
660880(%)ꢁ  
150  
20(%)ꢁ  
30  
75  
Increase 2500 by 15%. (2875)  
25002500  
15(%)ꢁ  
25(%)ꢁ  
2875  
2625  
Discount 3500 by 25%. (2625)  
35003500  
E-14  
 
Degree, Minute, Second (Sexagesimal) Calculations  
Performing an addition or subtraction operation between sexagesimal values,  
or a multiplication or division operation between a sexagesimal value and a  
decimal value will cause the result to be displayed as a sexagesimal value.  
You also can convert between sexagesimal and decimal. The following  
is the input format for a sexagesimal value: {degrees} {minutes} ꢀ  
{seconds} .  
Note: You must always input something for the degrees and minutes, even  
if they are zero.  
2°20´30˝ + 39´30˝ = 3°00´00˝  
2203003930ꢁ  
3°0´0˝  
Convert 2°15´18˝ to its decimal equivalent.  
215182°15´18˝  
(Converts sexagesimal to decimal.) ꢀ  
2.255  
(Converts decimal to sexagesimal.) 2°15´18˝  
Multi-Statements  
You can use the colon character (:) to connect two or more expressions and  
execute them in sequence from left to right when you press .  
3 + 3 : 3 s 3  
33# (:)3  
3ꢁ  
6
9
Using Engineering Notation  
A simple key operation transforms a displayed value to engineering  
notation.  
Transform the value 1234 to engineering notation, shifting the  
decimal point to the right.  
1234ꢁ  
'
1234  
1.234×103  
1234×100  
'
Transform the value 123 to engineering notation, shifting the decimal  
point to the left.  
123ꢁ  
123  
ꢁ'(k)  
ꢁ'(k) 0.000123×106  
0.123×103  
Calculation History  
In the COMP Mode, the calculator remembers up to approximately 200 bytes  
of data for the newest calculation. You can scroll through calculation history  
contents using D and A.  
1 + 1 = 2  
2 + 2 = 4  
11ꢁ  
22ꢁ  
2
4
E-15  
 
3 + 3 = 6  
33ꢁ  
(Scrolls back.) D  
6
4
2
(Scrolls back again.) D  
Note: Calculation history data is all cleared whenever you press , when  
you change to a different calculation mode, when you change the display  
format, or whenever you perform any reset operation.  
Replay  
While a calculation result is on the display, you can press B or C to edit  
the expression you used for the previous calculation.  
4 × 3 + 2.5 = 14.5 1  
4
32.514.5  
4 × 3 − 7.1 = 4.9 (Continuing) B))))7.1ꢁ  
4.9  
Note: If you want to edit a calculation when the indicator is on the right  
side of a calculation result display (see “Reading the Display”), press ꢂ  
and then use B and C to scroll the calculation.  
Answer Memory (Ans)  
The last calculation result obtained is stored in Ans (answer) memory.  
Ans memory contents are updated whenever a new calculation result is  
displayed.  
To divide the result of 3 s 4 by 30 1  
3
4ꢁ  
(Continuing) 30ꢁ  
123 + 456 = 579 ꢀ  
789 – 579 = 210  
123456ꢁ  
ꢀꢁꢂꢃ  
(Continuing) 789ꢁ  
Variables (A, B, C, D, E, F, X,Y)  
Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You  
can assign values to variables and also use the variables in calculations.  
To assign the result of 3 + 5 to variable A  
35ꢁB(STO)E(A)  
8
To multiply the contents of variable A by 10  
(Continuing) #E(A)  
10ꢁ  
80  
8
To recall the contents of variable A (Continuing) BE(A)  
To clear the contents of variable A  
0ꢁB(STO)E(A)  
0
E-16  
 
Independent Memory (M)  
You can add calculation results to or subtract results from independent  
memory. The “M” appears on the display when there is any value other than  
zero stored in independent memory.  
To clear the contents of M  
0ꢁB(STO)J(M)  
(Continuing) 10 5J  
0
To add the result of 10 s 5 to M  
50  
To subtract the result of 10 + 5 from M  
(Continuing) 105J(M–)  
15  
35  
To recall the contents of M  
(Continuing) BJ(M)  
Note: Variable M is used for independent memory.  
Clearing the Contents of All Memories  
Ans memory, independent memory, and variable contents are retained even  
if you press , change the calculation mode, or turn off the calculator.  
Perform the following procedure when you want to clear the contents of  
all memories.  
(CLR)(Memory)(Yes)  
Prime Factorization  
In the COMP Mode, you can factor a positive integer up to 10 digits into  
prime factors up to three digits.  
To perform prime factorization on 1014  
1014ꢁ  
4(FACT)  
When you perform prime factorization on a value that includes a factor that  
is prime number with more than three digits, the part that cannot be factored  
will be enclosed in parentheses on the display.  
To perform prime factorization on 4104676 (= 22 s 10132)  
4(FACT)  
Any one of the following operations will exit prime factorization result  
display.  
• Pressing  
4(FACT) or .  
• Pressing any of the following keys: or 4.  
• Using the setup menu to change the angle unit setting (Deg, Rad, Gra) or  
the display digits setting (Fix, Sci, Norm).  
Note: • You will not be able to execute prime factorization while a decimal  
value, fraction, or negative value calculation result is displayed. Trying to  
do so will cause a math error (Math ERROR). • You will not be able to  
execute prime factorization while the result of a calculation that uses Pol,  
Rec is displayed.  
E-17  
 
Function Calculations  
For actual operations using each function, see the “Examples” section  
following the list below.  
: P is displayed as 3.141592654, but P = 3.14159265358980 is used for  
internal calculations.  
e: e is displayed as 2.718281828, but e = 2.71828182845904 is used for  
internal calculations.  
sin, cos, tan, sin−1, cos−1, tan1: Trigonometric functions. Specify the angle  
unit before performing calculations. See 1.  
sinh, cosh, tanh, sinh−1, cosh−1, tanh1: Hyperbolic functions. Input a  
function from the menu that appears when you press E. The angle unit  
setting does not affect calculations. See  
.
2
°, r, g: These functions specify the angle unit. ° specifies degrees, r radians,  
and g grads. Input a function from the menu that appears when you perform  
the following key operation: ꢁꢅ(DRG). See 3.  
, : Exponential functions. Note that the input method is different  
depending upon whether you are using Natural Display or Linear Display.  
See 4.  
log: Logarithmic function. Use the : key to input logab as log (a, b). Base  
10 is the default setting if you do not input anything for a. The  key also  
can be used for input, but only while Natural Display is selected. In this  
case, you must input a value for the base. See  
.
5
ln: Natural logarithm to base e. See  
.
6
2
3
−1  
x , x , x9, , , , x : Powers, power roots, and reciprocals. Note  
that the input methods for x9, , , and  are different depending upon  
whether you are using Natural Display or Linear Display. See  
.
7
2
Note: The following functions cannot be input in consecutive sequence: x ,  
3
−1  
x , x9, x . If you input 277, for example, the final 7 will be ignored. To  
input 2, input 27, press the B key, and then press 7().  
2
2
Pol, Rec: Pol converts rectangular coordinates to polar coordinates, while  
Rec converts polar coordinates to rectangular coordinates. See  
.
8
Pol(x, y) = (r, Ƨ)  
Rec(r, Ƨ) = (x, y)  
Specify the angle unit before  
performing calculations.  
The calculation result for r and Ƨ  
and for x and y are each assigned  
respectively to variables X and Y.  
Calculation result Q is displayed  
in the range of −180° Q ꢂ  
180°.  
Rectangular  
Coordinates (Rec)  
Polar  
Coordinates (Pol)  
x!: Factorial function. See  
.
9
Abs: Absolute value function. Note that the input method is different  
depending upon whether you are using Natural Display or Linear Display.  
See  
.
10  
Ran#: Generates a 3-digit pseudo random number that is less than 1. The  
result is displayed as a fraction when Natural Display is selected. See  
.
11  
E-18  
 
RanInt#: For input of the function of the form RanInt#(a, b), which generates  
a random integer within the range of a to b. See  
.
12  
nPr, nCr: Permutation (nPr) and combination (nCr) functions. See  
.
13  
Rnd:Theargumentofthisfunctionismadeadecimalvalueandthenrounded  
in accordance with the current number of display digits setting (Norm, Fix, or  
Sci). With Norm 1 or Norm 2, the argument is rounded off to 10 digits. With  
Fix and Sci, the argument is rounded off to the specified digit. When Fix 3  
is the display digits setting, for example, the result of 10 ÷ 3 is displayed  
as 3.333, while the calculator maintains a value of 3.33333333333333 (15  
digits) internally for calculation. In the case of Rnd(10÷3) = 3.333 (with Fix  
3), both the displayed value and the calculator’s internal value become  
3.333. Because of this a series of calculations will produce different results  
depending on whether Rnd is used (Rnd(10÷3) s 3 = 9.999) or not used (10  
÷ 3 s 3 = 10.000). See  
.
14  
Note: Using functions can slow down a calculation, which may delay display  
of the result. Do not perform any subsequent operation while waiting for the  
calculation result to appear. To interrupt an ongoing calculation before its  
result appears, press .  
Examples  
sin 30°= 0.5 1B  
sin−10.5 = 30° 1B Q(sin−1)0.5ꢅꢁ  
Q30ꢅꢁ  
0.5  
30  
1
2
3
sinh 1 = 1.175201194  
cosh–1 1 = 0  
E@(sinh)1ꢅꢁ 1.175201194  
ED(cosh−1)1ꢅꢁ  
0
P/2 radians = 90°, 50 grads = 45°  
B
(P)2ꢁꢅ(DRG)A(r)ꢁ  
50ꢁꢅ(DRG)B(g)ꢁ  
90  
45  
5
To calculate e s 2 to three significant digits (Sci 3)  
4
ꢁꢃ(SETUP)(Sci)ꢁ  
1
ꢁ7()5C  
ꢁ7()5ꢅ  
2ꢁ  
2ꢁ  
2.97×102  
2.97×102  
log101000 = log 1000 = 3  
log216 = 4  
:1000ꢅꢁ  
:2(,)16ꢅꢁ  
2C16ꢁ  
3
4
4
5
e
To calculate ln 90 (= log 90) to three significant digits (Sci 3)  
6
ꢁꢃ(SETUP)(Sci)ꢁ  
790ꢅꢁ  
4.50×100  
1.2 s 103 = 1200 ꢀ  
1.2  
103ꢁ  
1200  
16  
15625  
7
(1+1)2+2 = 16  
(52)3 = 15625  
5
1122ꢁ  
5V ꢁ  
= 2  
1
() 5C32ꢂ  
5()32ꢅꢁ  
2
2
32  
E-19  
 
'
'
To calculate 2  
3 (= 3 2 = 4.242640687...) to three decimal  
×
places (Fix 3)  
'
3
4.243  
4.243  
ꢁꢃ(SETUP)(Fix)ꢀ  
2C  
2ꢅ  
3ꢂ  
ꢂ  
3ꢂ  
2
1
' '  
To convert rectangular coordinates ( 2 , 2 ) to polar coordinates  
8
B
(Pol)  
2C(,)  
2(,)  
2Cr=2,Ƨ=45  
1
(Pol)  
2ꢅꢅꢂ  
r= 2  
ꢀ ꢀ  
Ƨ= 45  
'
To convert polar coordinates ( 2 , 45°) to rectangular coordinates  
B
(Rec)  
2C(,)45ꢂ  
X=1,Y=1  
40320  
9
(5 + 3) ! = 40320  
53(x!)ꢂ  
|2 – 7| s 2 = 10  
10  
27C  
27ꢅ  
2ꢁ  
2ꢁ  
10  
10  
1
To obtain three random three-digit integers  
11  
1000(Ran#)ꢁ  
459  
48  
117  
(Results shown here are for illustrative purposes only. Actual results will differ.)  
12 To generate random integers in the range of 1 to 6  
#(RanInt)1(,)6ꢅꢁ  
2
6
1
(Results shown here are for illustrative purposes only. Actual results will differ.)  
13 To determine the number of permutations and combinations  
possible when selecting four people from a group of 10  
Permutations:  
10ꢁ  
(nPr)4ꢁ  
5040  
210  
Combinations: 10(nCr)4ꢁ  
14 To perform the following calculations when Fix 3 is selected for the  
number of display digits: 10 ÷ 3 s 3 and Rnd(10 ÷ 3) s 3  
1
ꢁꢃ(SETUP)(Fix)ꢁ  
103  
3ꢂ  
3ꢂ  
10.000  
9.999  
(Rnd)103ꢊ  
E-20  
 
Statistical Calculations (STAT)  
To start a statistical calculation, perform the key operation (STAT)  
to enter the STAT Mode and then use the screen that appears to select the  
type of calculation you want to perform.  
To select this type of statistical calculation:  
Press this key:  
(Regression formula shown in parentheses)  
Single-variable (X)  
(1-VAR)  
(A+BX)  
Paired-variable (X, Y), linear regression (y = A + Bx)  
Paired-variable (X, Y), quadratic regression  
(_+CX2)  
(ln X)  
2
(y = A + Bx + Cx )  
Paired-variable (X, Y), logarithmic regression  
(y = A + Blnx)  
Paired-variable (X, Y), e exponential regression  
(e^X)  
Bx  
(y = Ae )  
Paired-variable (X, Y), ab exponential regression  
(AB^X)  
(AX^B)  
(1/X)  
(y = ABx)  
B
Paired-variable (X, Y), power regression (y = Ax )  
Paired-variable (X, Y), inverse regression  
(y = A + B/x)  
Pressing any of the above keys (to ) displays the Stat Editor.  
Note: When you want to change the calculation type after entering the  
STAT Mode, perform the key operation (STAT)(Type) to display  
the calculation type selection screen.  
Inputting Data  
Use the Stat Editor to input data. Perform the following key operation to  
display the Stat Editor: (STAT)(Data).  
The Stat Editor provides 80 rows for data input when there is an X column  
only, 40 rows when there are X and FREQ columns or X and Y columns, or  
26 rows when there are X, Y, and FREQ columns.  
Note: Use the FREQ (frequency) column to input the quantity (frequency) of  
identical data items. Display of the FREQ column can be turned on (displayed)  
or off (not displayed) using the Stat Format setting on the setup menu.  
To select linear regression and input the following data:  
1
(170, 66), (173, 68), (179, 75)  
STAT  
(STAT)(A+BX)  
STAT  
170173179AC  
STAT  
666875ꢂ  
E-21  
 
Important: • All data currently input in the Stat Editor is deleted whenever  
you exit the STAT Mode, switch between the single-variable and a paired-  
variable statistical calculation type, or change the Stat Format setting on  
the setup menu. • The following operations are not supported by the Stat  
Editor: ;, ꢁ;(M–), ꢁB(STO). Pol, Rec, and multi-statements  
also cannot be input with the Stat Editor.  
To change the data in a cell: In the Stat Editor, move the cursor to the cell  
that contains the data you want to change, input the new data, and then  
press .  
To delete a line: In the Stat Editor, move the cursor to the line that you want  
to delete and then press ).  
To insert a line: In the Stat Editor, move the cursor to the location where  
you want to insert the line and then perform the following key operation:  
(STAT)(Edit)(Ins).  
To delete all Stat Editor contents: In the Stat Editor, perform the following  
key operation: (STAT)(Edit)(Del-A).  
Obtaining Statistical Values from Input Data  
To obtain statistical values, press while in the Stat Editor and then  
2
recall the statistical variable (Sx, 3x , etc.) you want. Supported statistical  
variables and the keys you should press to recall them are shown below.  
For single-variable statistical calculations, the variables marked with an  
asterisk (*) are available.  
2
2
3
2
4
Sum: 3x *, 3x*, 3y , 3y, 3xy, 3x , 3x y, 3x  
(STAT) (Sum) to ꢉ  
Number of Items: n*, Mean: M*, N, Population Standard Deviation: Sx*,  
Sy, Sample Standard Deviation: sx*, sy  
(STAT) (Var) to ꢈ  
Minimum Value: minX*, minY, Maximum Value: maxX*, maxY  
(STAT) (MinMax) to ꢅ  
(When the single-variable statistical calculation is selected)  
(STAT) (MinMax) to ꢆ  
(When a paired-variable statistical calculation is selected)  
Regression Coefficients: A, B, Correlation Coefficient: r, Estimated  
Values: K, L  
(STAT) (Reg) to ꢇ  
Regression Coefficients for Quadratic Regression: A, B, C, Estimated  
Values: K1, K2, L  
(STAT) (Reg) to ꢃ  
• See the table at the beginning of this section of the manual for the regression  
formulas.  
K, K1, K2 and L are not variables. They are commands of the type that take  
an argument immediately before them. See “Calculating Estimated Values”  
for more information.  
To input the single-variable data x = {1, 2, 2, 3, 3, 3, 4, 4, 5}, using  
2
the FREQ column to specify the number of repeats for each items  
({xn; freqn} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and  
population standard deviation.  
E-22  
 
ꢁꢃ(SETUP)A(STAT)(ON)  
(STAT)(1-VAR)  
ꢀꢁꢂꢁ  
12345AC  
1232ꢂ  
ꢂꢁ(STAT)(Var)(M)ꢂ  
ꢂꢁ(STAT)(Var)(Sx)ꢂ  
Results: Mean: 3 Population Standard Deviation: 1.154700538  
To calculate the linear regression and logarithmic regression  
3
correlation coefficients for the following paired-variable data and  
determine the regression formula for the strongest correlation: (x, y)  
= (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix 3  
(three decimal places) for results.  
ꢁꢃ(SETUP)A(STAT)(OFF)  
ꢁꢃ(SETUP)(Fix)ꢁ  
STAT  
FIX  
(STAT)(A+BX)  
20110200290AC  
3150731088009310ꢂ  
ꢂꢁ(STAT)(Reg)(r)ꢂ  
ꢂꢁ(STAT)(Type)(In X)  
ꢂꢁ(STAT)(Reg)(r)ꢂ  
ꢂꢁ(STAT)(Reg)(A)ꢂ  
ꢂꢁ(STAT)(Reg)(B)ꢂ  
Results: Linear Regression Correlation Coefficient: 0.923  
Logarithmic Regression Correlation Coefficient: 0.998  
Logarithmic Regression Formula: y = –3857.984 + 2357.532lnx  
Calculating Estimated Values  
Based on the regression formula obtained by paired-variable statistical  
calculation, the estimated value of y can be calculated for a given x-value.  
The corresponding x-value (two values, x1 and x2, in the case of quadratic  
regression) also can be calculated for a value of y in the regression  
formula.  
To determine the estimate value for y when x = 160 in the  
4
regression formula produced by logarithmic regression of the data  
in  
after completing the operations in  
160(STAT)(Reg)(L)ꢂ  
. Specify Fix 3 for the result. (Perform the following operation  
3
.)  
3
Result: 8106.898  
Important: Regression coefficient, correlation coefficient, and estimated  
value calculations can take considerable time when there are a large number  
of data items.  
E-23  
 
Creating a Number Table from a  
Function (TABLE)  
TABLE generates a number table for x and f(x) using an input f(x) function.  
Perform the following steps to generate a number table.  
1. Press (TABLE) to enter the TABLE Mode.  
2. Input a function in the format f(x), using the X variable.  
• Be sure to input the X variable (#(X)) when generating a number  
table. Any variable other than X is handled as a constant.  
• Pol and Rec cannot be input in the function.  
3. In response to the prompts that appear, input the values you want to use,  
pressing after each one.  
For this prompt: Input this:  
Start?  
End?  
Input the lower limit of X (Default = 1).  
Input the upper limit of X (Default = 5).  
Note: Make sure that the End value is always  
greater than the Start value.  
Input the increment step (Default = 1).  
Step?  
Note: The Step specifies by how much the Start  
value should be sequentially incremented as the  
number table is generated. If you specify Start = 1  
and Step = 1, X sequentially will be assigned the  
values 1, 2, 3, 4, and so on to generate the number  
table until the End value is reached.  
• Inputting the Step value and pressing generates and displays the  
number table in accordance with the parameters you specified.  
• Pressing while the number table screen is displayed will return to  
the function input screen in step 2.  
1
2
2
( ) =  
+
f x  
x
To generate a number table for the function  
for the  
range –1 x 1, incremented in steps of 0.5  
ꢀꢁꢂꢃ  
(TABLE)  
ꢀꢁꢂꢃ  
ꢀꢁꢂꢃ  
#(X)V12  
110.5ꢂ  
Note: • You can use the number table screen for viewing values only. Table  
contents cannot be edited. • The number table generation operation causes  
the contents of variable X to be changed.  
Important: The function you input for number table generation is deleted  
whenever you display the setup menu in the TABLE Mode and switch between  
Natural Display and Linear Display.  
E-24  
 
Using VERIFY (VERIF)  
VERIFY is a function you can use to verify whether an input equality or  
inequality is true (indicated by TRUE) or false (indicated by FALSE). The  
following shows the general procedure for using VERIFY.  
To verify whether 4  
= 12 is true  
'
9
1. Press (VERIF) to enter the VERIFY Mode.  
Math  
2. Input 4  
= 12.  
'
9
4
9C(VERIFY)(=)12  
• You can select the equality symbol  
or inequality symbol from the menu  
that appears when you press  
(VERIFY).  
Math  
3. To verify, press .  
You can input the following expressions for verification in the VERIFY  
Mode.  
16  
• Equalities or inequalities that include one relational operator 4 =  
,
4 p 3, P 3, 1 + 2 5, (3 × 6) (2 + 6) × 2, etc.  
• Equalitiesorinequalitiesthatincludemultiplerelationaloperators111+1,  
3 P 4, 22 = 2 + 2 = 4, 2 + 2 = 4 6, 2 + 3 = 5 p 2 + 5 = 8, etc.  
Note: • The verification result will cause 1 to be assigned to Ans memory  
when TRUE and 0 when FALSE. • The input expression can be a total of  
99 bytes, including the left side, right side, and relational operators. • Any  
variable (A, B, C, D, E, F, X, Y, M) input into an expression is treated as  
a value, using the value currently assigned to the variable. • Pol and Rec  
functions cannot be used in an expression.  
In the VERIFY Mode, the calculator performs a mathematical operation  
on the input expression and then displays TRUE or FALSE based on the  
result. Because of this, calculation error can occur or a mathematically  
correct result may not be able to be displayed when the input calculation  
expression includes calculation that approaches the singular point or  
inflection point of a function, or when the input expression contains multiple  
calculation operations.  
Expression Input Precautions  
The following types of expressions cause a Syntax ERROR and cannot  
be verified.  
• An expression with nothing on the left side or right side (Example: = 5')  
7
• An expression in which a relational operator is inside of a fraction or function  
1 = 1  
2
(Example:  
, cos (8 9))  
• An expression in which a relational operator is enclosed in parentheses  
(Example: 8 (9 10))  
E-25  
 
• An expression in which multiple relational operators that are not oriented  
in the same direction (Example: 5 6 > 4)  
• An expression that contains two of the following operators in any combination  
(Example: 4 6 p 8)  
• An expression that contains consecutive relational operators  
(Example: 5 > ꢀ 9)  
VERIFY Mode Calculation Examples  
To verify log2 log3 log4  
(VERIF)  
:2(VERIFY)()  
:3(VERIFY)()  
:4ꢊꢂ  
3
2
8
8
To verify 0 ꢁ  
( )  
9
( )  
9
(VERIF)  
0(VERIFY)()  
89C 89C7ꢂ  
To verify 52 = 25 =  
625  
(VERIF)  
57(VERIFY)(=)  
25(VERIFY)(=)  
625ꢂ  
Calculation Ranges, Number of Digits,  
and Precision  
The calculation range, number of digits used for internal calculation, and  
calculation precision depend on the type of calculation you are performing.  
Calculation Range and Precision  
Calculation Range  
p1 s 10–99 to p9.999999999 s 1099 or 0  
Number of Digits for Internal  
Calculation  
15 digits  
In general, p1 at the 10th digit for a single  
calculation. Precision for exponential  
display is p1 at the least significant digit.  
Errors are cumulative in the case of  
consecutive calculations.  
Precision  
Function Calculation Input Ranges and Precision  
Functions  
Input Range  
0 \x\ 9 s 109  
DEG  
RAD  
GRA  
sinx  
0 \x\ 157079632.7  
0 \x\ 1 s 1010  
E-26  
 
0 \x\ 9 s 109  
DEG  
RAD  
GRA  
DEG  
RAD  
GRA  
cosx  
tanx  
0 \x\ 157079632.7  
0 \x\ 1 s 1010  
Same as sinx, except when \x\ = (2n–1) s 90.  
Same as sinx, except when \x\ = (2n–1) s P/2.  
Same as sinx, except when \x\ = (2n–1) s 100.  
sin–1x  
0 \x\ 1  
0 \x\ 9.999999999 s 1099  
cos–1x  
tan–1x  
sinhx  
0 \x\ 230.2585092  
coshx  
sinh–1x  
0 \x\ 4.999999999 s 1099  
1 x 4.999999999 s 1099  
0 \x\ 9.999999999 s 1099  
0 \x\ 9.999999999 s 10–1  
0 x 9.999999999 s 1099  
–9.999999999 s 1099 x 99.99999999  
–9.999999999 s 1099 x 230.2585092  
0 x 1 s 10100  
cosh–1x  
tanhx  
tanh–1x  
logx/lnx  
10x  
ex  
'x  
2
x
\x\ 1 s 1050  
–1  
x
\x\ 1 s 10100 ; x & 0  
3
\x\ 1 s 10100  
x  
x!  
0 x 69 (x is an integer)  
0 n 1 s 1010, 0 r n (n, r are integers)  
nPr  
1 {n!/(nr)!} 1 s 10100  
0 n 1 s 1010, 0 r n (n, r are integers)  
1 n!/r! 1 s 10100 or 1 n!/(nr)! 1 s 10100  
nCr  
\x\, \y\ 9.999999999 s 1099  
Pol(x, y)  
Rec(r, Ƨ)  
9.999999999 s 1099  
2
2
+
x y  
0 r 9.999999999 s 1099  
Ƨ: Same as sinx  
\a\, b, c 1 s 10100; 0 b, c  
The display seconds value is subject to an error of 21 at  
the second decimal place.  
°’ ”  
\x\ 1 s 10100  
Decimal j Sexagesimal Conversions  
0°0\x\ 9999999°5959˝  
x 0: –1 s 10100 ylogx 100  
x = 0: y 0  
m
xy  
x 0: y = n,  
(m, n are integers)  
2 +1  
n
However: –1 s 10100 ylog \x\ 100  
E-27  
 
y 0: x & 0, –1 s 10100 1/x logy 100  
y = 0: x 0  
x
2 +1  
n
'y  
y 0: x = 2n+1,  
(m & 0; m, n are integers)  
m
However: –1 s 10100 1/x log \y\ 100  
Total of integer, numerator, and denominator must be 10  
digits or less (including division marks).  
ab/  
c
10  
10  
\ \ \ \  
a b; a , b 1 s 10 ; b a 1 s 10  
RanInt#(a, b)  
• Precision is basically the same as that described under “Calculation Range  
ayndxPrecision”, above.  
3
x , y, , x!, nPr, nCr type functions require consecutive internal  
'
calculation, which can cause accumulation of errors that occur with each  
calculation.  
• Error is cumulative and tends to be large in the vicinity of a function’s singular  
point and inflection point.  
• The range for calculation results that can be displayed in P form when using  
6
\ \  
Natural Display is x 10 . Note, however, that internal calculation error  
can make it impossible to display some calculation results in P form. It also  
can cause calculation results that should be in decimal form to appear in  
P form.  
Errors  
The calculator will display an error message whenever an error occurs for  
any reason during a calculation. There are two ways to exit an error message  
display: Pressing B or C to display the location of the error, or pressing  
to clear the message and calculation.  
Displaying the Location of an Error  
While an error message is displayed, press B or C to return to the  
calculation screen. The cursor will be positioned at the location where  
the error occurred, ready for input. Make the necessary corrections to the  
calculation and execute it again.  
When you input 14 ÷ 0 s 2 = by mistake instead of 14 ÷ 10 s 2 =  
ꢀꢁꢂꢃ  
140  
2ꢂ  
Math  
C (or B)  
B1ꢂ  
ꢀꢁꢂꢃ  
Clearing the Error Message  
While an error message is displayed, press to return to the calculation  
screen. Note that this also clears the calculation that contained the error.  
E-28  
 
Error Messages  
Math ERROR  
Cause: • The intermediate or final result of the calculation you are performing  
exceeds the allowable calculation range. • Your input exceeds the allowable  
input range (particularly when using functions). • The calculation you are  
performing contains an illegal mathematical operation (such as division  
by zero).  
Action: • Check the input values, reduce the number of digits, and try again.  
• When using independent memory or a variable as the argument of a function,  
make sure that the memory or variable value is within the allowable range  
for the function.  
Stack ERROR  
Cause: The calculation you are performing has caused the capacity of the  
numeric stack or the command stack to be exceeded.  
Action: • Simplify the calculation expression so it does not exceed the  
capacity of the stack. • Try splitting the calculation into two or more parts.  
Syntax ERROR  
Cause: There is a problem with the format of the calculation you are  
performing.  
Action: Make necessary corrections.  
Insufficient MEM Error  
Cause: The configuration of TABLE Mode parameters caused more than 30  
X-values to be generated for a table.  
Action: Narrow the table calculation range by changing the Start, End, and  
Step values, and try again.  
Argument ERROR  
Cause: A non-integer argument was input for the random number function  
(RanInt#).  
Action: Input only integers for the argument.  
Before Assuming Malfunction of the  
Calculator...  
Perform the following steps whenever an error occurs during a calculation  
or when calculation results are not what you expected. If one step does not  
correct the problem, move on to the next step.  
Note that you should make separate copies of important data before  
performing these steps.  
1. Check the calculation expression to make sure that it does not contain any  
errors.  
2. Make sure that you are using the correct mode for the type of calculation  
you are trying to perform.  
3. If the above steps do not correct your problem, press the key. This will  
cause the calculator to perform a routine that checks whether calculation  
functions are operating correctly. If the calculator discovers any abnormality,  
it automatically initializes the calculation mode and clears memory contents.  
For details about initialized settings, see “Configuring the Calculator  
Setup”.  
4. Initialize all modes and settings by performing the following operation:  
(CLR)(Setup)(Yes).  
E-29  
 
Replacing the Battery  
A low battery is indicated by a dim display, even if contrast is adjusted, or by  
failure of figures to appear on the display immediately after you turn on the  
calculator. If this happens, replace the battery with a new one.  
Important: Removing the battery will cause all of the calculator’s memory  
contents to be deleted.  
1. Press ꢁꢂ(OFF) to turn off the calculator.  
2. Remove the cover as shown in the illustration and replace the battery,  
taking care that its plus (+) and minus (–) ends are facing correctly.  
3. Replace the cover.  
4. Initialize the calculator: ꢀꢁ(CLR)(All)(Yes)  
• Do not skip the above step!  
Screw  
Screw  
Screw  
fx-83GT PLUS  
fx-85GT PLUS  
Specifications  
Power Requirements:  
fx-83GT PLUS: AAA-size battery R03 (UM-4) s 1  
fx-85GT PLUS: Built-in solar cell; button battery LR44 (GPA76) s 1  
Approximate Battery Life:  
fx-83GT PLUS: 17,000 hours (continuous display of flashing cursor)  
fx-85GT PLUS: 3 years (based on one hour of operation per day)  
Power Consumption: 0.0002 W (fx-83GT PLUS)  
Operating Temperature: 0°C to 40°C (32°F to 104°F)  
Dimensions:  
fx-83GT PLUS: 13.8 (H) s 80 (W) s 162 (D) mm  
1
/
2(H) s 31/8(W) s 63/8(D)  
fx-85GT PLUS: 11.1 (H) s 80 (W) s 162 (D) mm  
3
/
8(H) s 31/8(W) s 63/8(D)  
Approximate Weight:  
fx-83GT PLUS: 100 g (3.5 oz) including the battery  
fx-85GT PLUS: 95 g (3.4 oz) including the battery  
Frequently Asked Questions  
I How can I perform input and display results the same way I did on a  
model that does not have Natural Textbook Display?  
Perform the following key operation: ꢁꢃ(SETUP)(LineIO). See  
“Configuring the Calculator Setup” on page E-5 for more information.  
I How can I change a fraction form result to decimal form?  
How can I change a fraction form result produced by a division  
operation to decimal form?  
See “Toggling Calculation Results” on page E-13 for the procedure.  
E-30  
 
I What is the difference between Ans memory, independent memory,  
and variable memory?  
Each of these types of memory acts like “containers” for temporary storage  
of a single value.  
Ans Memory: Stores the result of the last calculation performed. Use this  
memory to carry the result of one calculation on to the next.  
Independent Memory: Use this memory to totalize the results of multiple  
calculations.  
Variables: This memory is helpful when you need to uses the same value  
multiple times in one or more calculations.  
I What is the key operation to take me from the STAT Mode or TABLE  
Mode to a mode where I can perform arithmetic calculations?  
Press (COMP).  
I How can I return the calculator to its initial default settings?  
Perform the following operation: (CLR)(Setup)(Yes)  
I When I execute a function calculation, why do I get a calculation result  
that is completely different from older CASIO calculator models?  
With a Natural Textbook Display model, the argument of a function that  
uses parentheses must be followed by a closing parenthesis. Failing to  
press after the argument to close the parentheses may cause unwanted  
values or expressions to be included as part of the argument.  
Example: (sin 30) + 15 B  
Older (S-VPAM) Model:  
Q301515.5  
Natural Textbook Display Model: 1 Q301515.5  
Failure to press here as shown below will result in calculation of sin 45.  
Q30150.7071067812  
Manufacturer:  
CASIO COMPUTER CO., LTD.  
6-2, Hon-machi 1-chome  
Shibuya-ku, Tokyo 151-8543, Japan  
Responsible within the European Union:  
CASIO EUROPE GmbH  
Casio-Platz 1  
22848 Norderstedt, Germany  
This mark applies in EU countries only.  
SA0909-A  
 

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