Casio FX-CG20 User manual

CASIO Worldwide Education Website
http://edu.casio.com
Manuals are available in multi languages at
http://world.casio.com/manual/calc
fx-CG10
fx-CG20
fx-CG20 AU
Software Version 2.02
User’s Guide
E

i
• The contents of this user’s guide are subject to change without notice.
• No part of this user’s guide may be reproduced in any form without the express written
consent of the manufacturer.
• Be sure to keep all user documentation handy for future reference.

ii
Contents
Getting Acquainted — Read This First!
Chapter 1 Basic Operation
1. Keys .............................................................................................................................. 1-1
2. Display .......................................................................................................................... 1-3
3. Inputting and Editing Calculations................................................................................. 1-7
4. Using the Math Input/Output Mode ............................................................................. 1-13
5. Option (OPTN) Menu .................................................................................................. 1-27
6. Variable Data (VARS) Menu ....................................................................................... 1-28
7. Program (PRGM) Menu ............................................................................................. 1-31
8. Using the Setup Screen .............................................................................................. 1-32
9. Using Screen Capture................................................................................................. 1-36
10. When you keep having problems… ........................................................................... 1-37
Chapter 2 Manual Calculations
1. Basic Calculations......................................................................................................... 2-1
2. Special Functions.......................................................................................................... 2-7
3. Specifying the Angle Unit and Display Format............................................................ 2-12
4. Function Calculations.................................................................................................. 2-14
5. Numerical Calculations ............................................................................................... 2-25
6. Complex Number Calculations.................................................................................... 2-35
7. Binary, Octal, Decimal, and Hexadecimal Calculations with Integers......................... 2-39
8. Matrix Calculations...................................................................................................... 2-42
9. Vector Calculations ..................................................................................................... 2-59
10. Metric Conversion Calculations................................................................................... 2-64
Chapter 3 List Function
1. Inputting and Editing a List............................................................................................ 3-1
2. Manipulating List Data................................................................................................... 3-7
3. Arithmetic Calculations Using Lists ............................................................................. 3-13
4. Switching between List Files....................................................................................... 3-17
5. Using CSV Files.......................................................................................................... 3-18
Chapter 4 Equation Calculations
1. Simultaneous Linear Equations .................................................................................... 4-1
2. High-order Equations from 2nd to 6th Degree .............................................................. 4-3
3. Solve Calculations......................................................................................................... 4-4
Chapter 5 Graphing
1. Sample Graphs ............................................................................................................. 5-1
2. Controlling What Appears on a Graph Screen.............................................................. 5-5
3. Drawing a Graph......................................................................................................... 5-13
4. Saving and Recalling Graph Screen Contents............................................................ 5-20
5. Drawing Two Graphs on the Same Screen................................................................. 5-23
6. Manual Graphing......................................................................................................... 5-25
7. Using Tables ............................................................................................................... 5-30
8. Modifying a Graph....................................................................................................... 5-36
9. Dynamic Graphing ...................................................................................................... 5-40
10. Graphing a Recursion Formula................................................................................... 5-43
11. Graphing a Conic Section ........................................................................................... 5-48

iii
12. Drawing Dots, Lines, and Text on the Graph Screen (Sketch) ................................... 5-50
13. Function Analysis........................................................................................................ 5-52
Chapter 6 Statistical Graphs and Calculations
1. Before Performing Statistical Calculations .................................................................... 6-1
2. Calculating and Graphing Single-Variable Statistical Data ........................................... 6-8
3. Calculating and Graphing Paired-Variable Statistical Data (Curve Fitting) ................. 6-15
4. Performing Statistical Calculations.............................................................................. 6-23
5. Tests ........................................................................................................................... 6-33
6. Confidence Interval ..................................................................................................... 6-47
7. Distribution .................................................................................................................. 6-50
8. Input and Output Terms of Tests, Confidence Interval, and Distribution .................... 6-66
9. Statistic Formula ......................................................................................................... 6-69
Chapter 7 Financial Calculation
1. Before Performing Financial Calculations ..................................................................... 7-1
2. Simple Interest .............................................................................................................. 7-3
3. Compound Interest........................................................................................................ 7-4
4. Cash Flow (Investment Appraisal) ................................................................................ 7-7
5. Amortization .................................................................................................................. 7-9
6. Interest Rate Conversion ............................................................................................ 7-12
7. Cost, Selling Price, Margin.......................................................................................... 7-13
8. Day/Date Calculations................................................................................................. 7-14
9. Depreciation................................................................................................................ 7-15
10. Bond Calculations ....................................................................................................... 7-17
11. Financial Calculations Using Functions ...................................................................... 7-20
Chapter 8 Programming
1. Basic Programming Steps............................................................................................. 8-1
2. Program Mode Function Keys...................................................................................... 8-2
3. Editing Program Contents............................................................................................. 8-4
4. File Management .......................................................................................................... 8-6
5. Command Reference.................................................................................................. 8-11
6. Using Calculator Functions in Programs..................................................................... 8-28
7. Program Mode Command List ................................................................................... 8-51
8. CASIO Scientific Function Calculator
Special Commands
⇔Text Conversion Table .......................................................... 8-59
9. Program Library .......................................................................................................... 8-66
Chapter 9 Spreadsheet
1. Spreadsheet Basics and the Function Menu ................................................................ 9-1
2. Basic Spreadsheet Operations ..................................................................................... 9-3
3. Using Special Spreadsheet Mode Commands .......................................................... 9-19
4. Conditional Formatting................................................................................................ 9-21
5. Drawing Statistical Graphs, and Performing Statistical and Regression
Calculations................................................................................................................. 9-27
6. Spreadsheet Mode Memory....................................................................................... 9-34
Chapter 10 eActivity
1. eActivity Overview....................................................................................................... 10-1
2. eActivity Function Menus ............................................................................................ 10-2
3. eActivity File Operations ............................................................................................. 10-4
4. Inputting and Editing Data........................................................................................... 10-6

iv
Chapter 11 Memory Manager
1. Using the Memory Manager........................................................................................ 11-1
Chapter 12 System Manager
1. Using the System Manager......................................................................................... 12-1
2. System Settings .......................................................................................................... 12-1
Chapter 13 Data Communication
1. Performing Data Communication between
the Calculator and a Personal Computer.................................................................... 13-3
2. Performing Data Communication between Two Calculators..................................... 13-10
3. Connecting the Calculator to a Projector .................................................................. 13-16
Chapter 14 Geometry
1. Geometry Mode Overview ......................................................................................... 14-1
2. Drawing and Editing Objects..................................................................................... 14-11
3. Controlling the Appearance of the Geometry Window .............................................. 14-33
4. Using Text and Labels in a Screen Image ................................................................ 14-37
5. Using the Measurement Box..................................................................................... 14-41
6. Working with Animations........................................................................................... 14-56
Chapter 15 Picture Plot
1. Picture Plot Function Menus ....................................................................................... 15-3
2. Managing Picture Plot Files ........................................................................................ 15-5
3. Using the Plot Function............................................................................................... 15-7
4. Using the Plot List ..................................................................................................... 15-13
5. Common Functions with the Graph Mode ................................................................ 15-18
Appendix
1. Error Message Table ....................................................................................................α-1
2. Input Ranges ..............................................................................................................α-14
E-CON3 Application
1. E-CON3 Overview......................................................................................................... ε-1
2. Using the Setup Wizard ................................................................................................ ε-2
3. Using Advanced Setup.................................................................................................. ε-8
4. Using a Custom Probe................................................................................................ ε-19
5. Using the MULTIMETER Mode................................................................................... ε-23
6. Using Setup Memory................................................................................................... ε-24
7. Using Program Converter ........................................................................................... ε-27
8. Starting a Sampling Operation.................................................................................... ε-30
9. Using Sample Data Memory ....................................................................................... ε-33
10. Using the Graph Analysis Tools to Graph Data .......................................................... ε-35
11. Graph Analysis Tool Graph Screen Operations.......................................................... ε-39
12. Calling E-CON3 Functions from an eActivity .............................................................. ε-50

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Getting Acquainted — Read This First!
kAbout this User’s Guide
uMath natural input and display
Under its initial default settings, the calculator is set up to use the “Math input/output mode”,
which enables natural input and display of math expressions. This means you can input
fractions, square roots, derivatives, and other expressions just as they are written. In the
“Math input/output mode”, most calculation results also are displayed using natural display.
You also can select a “Linear input/output mode” if you like, for input and display of
calculation expressions in a single line.
The examples shown in this User’s Guide are mainly presented using the Math input/output
mode. “<Linear input/output mode>” will be indicated for examples that use the Linear input/
output mode.
• For information about switching between the Math input/output mode and Linear input/
output mode, see the explanation of the “Input/Output” mode setting under “Using the Setup
Screen” (page 1-32).
• For information about input and display using the Math input/output mode, see “Using the
Math Input/Output Mode” (page 1-13).
u!x(')
The above indicates you should press !and then x, which will input a 'symbol. All
multiple-key input operations are indicated like this. Key cap markings are shown, followed by
the input character or command in parentheses.
umEquation
This indicates you should first press m, use the cursor keys (f, c, d, e) to select
the Equation mode, and then press w. Operations you need to perform to enter a mode
from the Main Menu are indicated like this.
uFunction Keys and Menus
• Many of the operations performed by this calculator can be executed by pressing function
keys 1through 6. The operation assigned to each function key changes according to
the mode the calculator is in, and current operation assignments are indicated by function
menus that appear at the bottom of the display.
• This User’s Guide shows the current operation assigned to a function key in parentheses
following the key cap for that key. 1(Comp), for example, indicates that pressing 1
selects {Comp}, which is also indicated in the function menu.
• When (g) is indicated in the function menu for key 6, it means that pressing 6displays
the next page or previous page of menu options.
0

vi
uMenu Titles
• Menu titles in this User’s Guide include the key operation required to display the menu
being explained. The key operation for a menu that is displayed by pressing Kand then
{LIST} would be shown as: [OPTN]-[LIST].
• 6(g) key operations to change to another menu page are not shown in menu title key
operations.
uCommand List
The Program Mode Command List (page 8-51) provides a graphic flowchart of the various
function key menus and shows how to maneuver to the menu of commands you need.
Example: The following operation displays Xfct: [VARS]-[FACTOR]-[Xfct]
kDisplay Brightness Adjustment
Adjust the brightness whenever objects on the display appear dim or difficult to see.
1. Use the cursor keys (f, c, d, e) to select the System icon and press w, then
press 1(DISPLAY) to display the brightness adjustment screen.
2. Adjust the brightness.
• The ecursor key makes display brightness lighter.
• The dcursor key makes display brightness darker.
• 1(INITIAL) returns display brightness to its initial default.
3. To exit display brightness adjustment, press m.
kExamination Mode
The Examination Mode puts some limits on calculator functions, which allows it to be used
when taking an exam or test. Use the Examination Mode only when actually taking an exam or
test.
Entering the Examination Mode affects calculator operation as described below.
• The following modes and functions are disabled: eActivity mode, Memory mode, E-CON3
mode, Program mode, vector commands, program commands (^(output command),
: (multi-statement command), _(carriage return)), data transfer, add-in applications, add-in
languages, storage memory access, user name editing, OS Update.
• User data (main memory) is backed up. The backed up data will be restored when you
exit the Examination Mode. Any data created during an Examination Mode session will be
deleted when the Examination Mode is exited.

vii
uEntering the Examination Mode
1. Press !o(OFF) to turn off the calculator.
2. While holding down the cand hkeys, press the okey.
• This displays the dialog box shown below.
3. Press 1(Yes).
• Read the message on the dialog box that appears.
4. Press 2.
• This displays the dialog box shown below.
5. Press J.
• Only the settings below are saved before entering the Examination Mode.
Input/Output, Frac Result, Angle, Complex Mode, Display, Q1Q3 Type, Language, Function
menu language, Battery Type
uCalculator Operation in the Examination Mode
• Entering the Examination Mode causes the entire display screen to be surrounded by a
green boundary. A flashing display icon ( ) will also appear on the display. The flash rate of
the icon slows down about 15 minutes after entering the Examination Mode.
Icon
Green boundary
• In the Examination Mode, the Auto Power Off trigger setting is fixed at approximately 60
minutes.

viii
• Pressing a- causes the dialog box shown below to appear. The dialog box shows the
elapsed time in the Examination Mode.
You can restart the elapsed time count by performing one of the operations below.
- Press the RESTART button.
- Remove the calculator’s batteries.
- Delete Main Memory data.
- Re-enter the Examination Mode while already in the Examination Mode.
• The table below shows how certain operations affect the Examination Mode.
If you do this: The calculator stays in
Examination Mode.
Data input in Examination
Mode is retained.
Turn power off and then back on
again Yes Yes
Press the RESTART button Yes No
Remove the calculator’s batteries Yes No
Delete Main Memory data Yes No
uExiting the Examination Mode
There are three ways to exit the Examination Mode.
(1) Exiting the Examination Mode by Connecting to a Computer
1. Use the USB cable to connect the calculator that is in the Examination Mode to a
computer.
2. When the “Select Connection Mode” dialog box appears on the calculator, press the
calculator’s 1key.
3. On the computer, open the calculator drive.
4. On the computer, copy or delete any file that is on the calculator drive.
5. Terminate the connection between the calculator and computer.
• The dialog box shown below will appear when you exit the Examination Mode.

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(2) Exiting the Examination Mode by Allowing 12 Hours to Elapse
Approximately 12 hours after entering the Examination Mode, turning on the calculator will
cause it to exit the Examination Mode automatically.
Important!
If you press the RESTART button or if you replace batteries before turning on the
calculator, it will re-enter the Examination Mode when turned on, even if 12 hours have
elapsed.
(3) Exiting the Examination Mode by Connecting to another Calculator
1. On the calculator that is in the Examination Mode (Calculator A), enter the Link mode
and then press 4(CABLE)2(3PIN).
2. Use the SB-62 cable to connect Calculator A to another calculator that is not in the
Examination Mode (Calculator B).
3. On Calculator A, press 2(RECV).
4. On Calculator B*, enter the Link mode and then press 3(EXAM)1(UNLOCK)
1(Yes).
• You could also transfer any data from Calculator B to Calculator A.
Example: To transfer setup data to Calculator A
1. On Calculator B, enter the Link mode and then press 1(TRANSMIT)1(MAIN)
1(SELECT).
2. Use cand fto select “SETUP”.
3. Press 1(SELECT)6(TRANSMIT)1(Yes).
* Calculator with Examination Mode function
• Exiting the Examination Mode will cause the green boundary and flashing icon ( ) to
disappear from the display.
uDisplaying Examination Mode Help
You can display Examination Mode help in the Link mode.
3(EXAM)2(ENTER) ... Displays help about entering the Examination Mode.
3(EXAM)3(APP) ... Displays help about what modes and functions are disabled in the
Examination Mode.
3(EXAM)4(EXIT) ... Displays help about exiting the Examination Mode.

1-1
Chapter 1 Basic Operation
1. Keys
kKey Table
Page Page Page Page Page Page
Page Page Page Page Page
2-1
1-31 1-32
1-2
2-16
2-16
2-1
2-1,
2-23
2-1 2-7
2-36
2-16
2-9
5-52 5-5 5-50 5-54 5-2,
5-33
5-8
1-27
2-16
2-17
2-17
1-22,
2-23
2-232-23
1-19
1-8
2-1
2-1
2-11
2-1
1-7,1-17
2-1
1-12
2-16
2-9
1-11
5-4,
5-15
2-49
1-36
1-12
3-3
2-36
10-21 10-19
2-16
1-2 2-16
1-16
1-28 1-3
Page Page Page Page Page Page
Page Page Page Page Page
2-1
1-31 1-32
1-2
2-16
2-16
2-1
2-1,
2-23
2-1 2-7
2-36
2-16
2-9
5-52 5-5 5-50 5-54 5-2,
5-33
5-8
1-27
2-16
2-17
2-17
1-22,
2-23
2-232-23
1-19
1-8
2-1
2-1
2-11
2-1
1-7,1-17
2-1
1-12
2-16
2-9
1-11
5-4,
5-15
2-49
1-36
1-12
3-3
2-36
10-21 10-19
2-16
1-2 2-16
1-16
1-28 1-3
1

1-2
kKey Markings
Many of the calculator’s keys are used to perform more than one function. The functions
marked on the keyboard are color coded to help you find the one you need quickly and easily.
Function Key Operation
1log l
210
x !l
3B al
The following describes the color coding used for key markings.
Color Key Operation
Yellow Press !and then the key to perform the marked function.
Red Press aand then the key to perform the marked function.
• Alpha Lock
Normally, once you press aand then a key to input an alphabetic character, the keyboard
reverts to its primary functions immediately.
If you press !and then a, the keyboard locks in alpha input until you press aagain.

1-3
2. Display
kSelecting Icons
This section describes how to select an icon in the Main Menu to enter the mode you want.
uTo select an icon
1. Press mto display the Main Menu.
2. Use the cursor keys (d, e, f, c) to move the
highlighting to the icon you want.
3. Press wto display the initial screen of the mode whose icon you selected.
• You can also enter a mode without highlighting an icon in the Main Menu by inputting the
number or letter marked in the upper right corner of the icon.
The following explains the meaning of each icon.
Icon Mode Name Description
Run-Matrix Use this mode for arithmetic calculations, function calculations,
binary, octal, decimal, and hexadecimal calculations, matrix
calculations, and vector calculations.
Statistics Use this mode to perform single-variable (standard deviation)
and paired-variable (regression) statistical calculations, to
perform tests, to analyze data and to draw statistical graphs.
eActivity eActivity lets you input text, math expressions, and other data
in a notebook-like interface. Use this mode when you want to
store text or formulas, or built-in application data in a file.
Spreadsheet Use this mode to perform spreadsheet calculations. Each file
contains a 26-column × 999-line spreadsheet. In addition to
the calculator’s built-in commands and Spreadsheet mode
commands, you can also perform statistical calculations and
graph statistical data using the same procedures that you use
in the Statistics mode.
Graph Use this mode to store graph functions and to draw graphs
using the functions.
Dyna Graph
(Dynamic Graph)
Use this mode to store graph functions and to draw multiple
versions of a graph by changing the values assigned to the
variables in a function.
Currently selected iconCurrently selected icon

1-4
Icon Mode Name Description
Table Use this mode to store functions, to generate a numeric table
of different solutions as the values assigned to variables in a
function change, and to draw graphs.
Recursion Use this mode to store recursion formulas, to generate a
numeric table of different solutions as the values assigned to
variables in a function change, and to draw graphs.
Conic Graphs Use this mode to draw graphs of conic sections.
Equation Use this mode to solve linear equations with two through six
unknowns, and high-order equations from 2nd to 6th degree.
Program Use this mode to store programs in the program area and to
run programs.
Financial Use this mode to perform financial calculations and to draw
cash flow and other types of graphs.
E-CON3 Use this mode to control the optionally available Data Logger.
Link Use this mode to transfer memory contents or back-up data to
another unit or PC.
Memory Use this mode to manage data stored in memory.
System Use this mode to initialize memory, adjust display brightness,
and to make other system settings.
Geometry Use this mode to draw and analyze geometric objects.
Picture Plot* Use this mode to plot points (that represent coordinates) on the
screen and to perform various types of analysis based on the
plotted data (coordinate values).
Conversion This icon appears when the “Metric Conversion” add-in
application is installed. It is not a function mode icon. When
“Metric Conversion” is installed, this icon is displayed on the
CONVERT menu, which is part of the option (OPTN) menu.
For more information about the option (OPTN) menu, see page
1-27. For information about using the CONVERT menu, see
“Metric Conversion Calculations” (page 2-64).
* fx-CG20 AU Users: Install the Picture Plot add-in application.

1-5
kAbout the Function Menu
Use the function keys (1to 6) to access the menus and commands in the menu bar
along the bottom of the display screen. You can tell whether a menu bar item is a menu or a
command by its appearance.
kStatus Bar
The status bar is an area that displays messages and the current status of the calculator. It is
always displayed at the top of the screen.
• Icons are used to indicate the information described below.
This icon: Indicates this:
The current battery level. The icons indicated (from left to right): Level 3,
Level 2, Level 1, Dead. See “Low Battery Message” (page 1-38) for more
information.
Important!
If the Level 1 icon ( ) appears, immediately replace the batteries. For
details about battery replacement, see the separate “Hardware User’s
Guide”.
Calculation in progress.
!key was pressed and the calculator is standing by for the next key
operation.
akey was pressed and the calculator is standing by for the next key
operation. The icon indicates the lower-case input mode (eActivity
and Program modes only).
Alpha Lock (page 1-2) is in effect.
!i(CLIP) was pressed and the calculator is standing by for range
specification (page 1-11).
Setup “Input/Output” setting.
Setup “Angle” setting.
Setup “Display” setting.
Setup “Frac Result” setting.
Setup “Complex Mode” setting.
• For details about the Setup screen, see “Using the Setup Screen” (page 1-32).
• For information about other icons and messages that are specific to each application, see
the chapters that cover each application.

1-6
kAbout Display Screens
This calculator uses two types of display screens: a text screen and a graph screen. The
text screen can show 21 columns and 8 lines of characters, with the bottom line used for the
function key menu. The graph screen uses an area that measures 384 (W) × 216 (H) dots.
Text Screen Graph Screen
kNormal Display
The calculator normally displays values up to 10 digits long. Values that exceed this limit are
automatically converted to and displayed in exponential format.
uHow to interpret exponential format
1.2
E
+12 indicates that the result is equivalent to 1.2 × 10
12
. This means that you should move
the decimal point in 1.2 twelve places to the right, because the exponent is positive. This
results in the value 1,200,000,000,000.
1.2
E
–03 indicates that the result is equivalent to 1.2 × 10
–3
. This means that you should move
the decimal point in 1.2 three places to the left, because the exponent is negative. This results
in the value 0.0012.
You can specify one of two different ranges for automatic changeover to normal display.
Norm 1 ................... 10
–2
(0.01) > |x|, |x| >10
10
Norm 2 ................... 10
–9
(0.000000001) > |x|, |x| >10
10
All of the examples in this manual show calculation results using Norm 1.
See page 2-13 for details on switching between Norm 1 and Norm 2.

1-7
kSpecial Display Formats
This calculator uses special display formats to indicate fractions, hexadecimal values, and
degrees/minutes/seconds values.
uFractions
.................... Indicates: 456
12
23
uHexadecimal Values
.................... Indicates: 0ABCDEF1
(16)
, which equals
180150001
(10)
uDegrees/Minutes/Seconds
.................... Indicates: 12° 34’ 56.78”
• In addition to the above, this calculator also uses other indicators or symbols, which are
described in each applicable section of this manual as they come up.
3. Inputting and Editing Calculations
kInputting Calculations
When you are ready to input a calculation, first press Ato clear the display. Next, input your
calculation formulas exactly as they are written, from left to right, and press wto obtain the
result.
Example 2 + 3 – 4 + 10 =
Ac+d-e+baw
kEditing Calculations
Use the dand ekeys to move the cursor to the position you want to change, and then
perform one of the operations described below. After you edit the calculation, you can execute
it by pressing w. Or you can use eto move to the end of the calculation and input more.
• You can select either insert or overwrite for input*
1
. With overwrite, text you input replaces
the text at the current cursor location. You can toggle between insert and overwrite by
performing the operation: !D(INS). The cursor appears as “ ” for insert and as “ ” for
overwrite.
*
1
Insert and overwrite switching is possible only when the Linear input/output mode (page
1-32) is selected.

1-8
uTo change a step
Example To change cos60 to sin60
Acga
ddd
D
s
uTo delete a step
Example To change 369 × × 2 to 369 × 2
Adgj**c
dD
In the insert mode, the Dkey operates as a backspace key.
uTo insert a step
Example To change 2.36
2
to sin2.36
2
Ac.dgx
ddddddd
s
kParentheses Colors during Calculation Formula Input
Parentheses are color coded during input and editing of calculation formulas in order to make
it easier to confirm the proper relationship between opening and closing parentheses.
The following rules are applied when assigning parentheses colors.
• When there are nested parentheses, colors are assigned in sequence from the outermost
parentheses inward. Colors are assigned in the following sequence: blue, red, green,
magenta, black. When there are more than five nesting levels, the color sequence is
repeated starting from blue again.

1-9
• Inputting a closing parenthesis assigns it the same color as the corresponding opening
parenthesis.
• The parentheses of parenthetical expressions that are of the same level are the same color.
Executing a calculation causes the color of all parentheses to become black.
kUsing Replay Memory
The last calculation performed is always stored into replay memory. You can recall the
contents of the replay memory by pressing dor e.
If you press e, the calculation appears with the cursor at the beginning. Pressing dcauses
the calculation to appear with the cursor at the end. You can make changes in the calculation
as you wish and then execute it again.
• Replay memory is enabled in the Linear input/output mode only. In the Math input/output
mode, the history function is used in place of replay memory. For details, see “History
Function” (page 1-21).
Example 1 To perform the following two calculations
4.12 × 6.4 = 26.368
4.12 × 7.1 = 29.252
Ae.bc*g.ew
dddd
!D(INS)
h.b
w

1-10
After you press A, you can press for cto recall previous calculations, in sequence from
the newest to the oldest (Multi-Replay Function). Once you recall a calculation, you can use
eand dto move the cursor around the calculation and make changes in it to create a new
calculation.
Example 2
Abcd+efgw
cde-fghw
A
f(One calculation back)
f(Two calculations back)
• A calculation remains stored in replay memory until you perform another calculation.
• The contents of replay memory are not cleared when you press the Akey, so you can
recall a calculation and execute it even after pressing the Akey.
kMaking Corrections in the Original Calculation
Example 14 ÷ 0 × 2.3 entered by mistake for 14 ÷ 10 × 2.3
Abe/a*c.d
w
Press J.
Cursor is positioned automatically at the
location of the cause of the error.
Make necessary changes.
db
Execute again.
w