Casio fx-5800P User manual

fx-5800P
User's Guide
http://world.casio.com/edu/
RJA516644-001V01
E

E-1
kRemove the insulation sheet!
Your calculator comes with a special insulation sheet, which isolates the battery from the
contacts in the battery compartment, to keep the battery from running down during storage
and shipment. Be sure to remove the insulation sheet before trying to use the calculator for
the first time.
To remove the insulation sheet
1. Pull the tab of the insulation sheet in the direction indicated by the arrow to remove it.
Pull to remove
引き抜いてください
2. After removing the insulation sheet, press the P button on the back of the calculator with
a thin, pointed object to initialize the calculator.
Be sure to perform this step! Do not skip it!
P button
kResetting the Calculator to Initial Defaults
Perform the operation below to return the calculator to its initial default settings. Note that
resetting the calculator will also delete all data currently stored in its memory.
To reset the calculator to initial defaults
1. Press
Nc3(SYSTEM)3(Reset All).
• This causes the “Reset All?” confirmation message to appear.
2. Press
E(Yes).
• If you do not want to reset the calculator to initial defaults, press
J(No) instead of
E(Yes).
The following is what happens when you reset the calculator to initial defaults.
• The calculation mode and setup configuration return to the initial defaults described under
“Clearing the Calculation Mode and Setup Settings (Reset Setup)” (page 13).
• Calculation history data, memory data, statistical calculation sample data, program data,
and all other data input by you is deleted.
PP

E-2
kAbout this Manual
• Most of the keys perform multiple functions. Pressing
1or Sand then another key
will perform the alternate function of the other key. Alternate functions are marked above
the keycap.
Alternate function
Keycap function
Alternate function operations are notated in this manual as shown below.
Example:
1s(sin–1)1E
The notation in parentheses indicates the function executed by the preceding key
operation.
• The following shows the notation used in the manual for menu items that appear on the
display.
Example:
z– {PROG} – {
/}
The notation in braces ({ }) indicates the menu item being selected.
• The following shows the notation used in the manual for menu items that appear on the
display (which are executed by pressing a number key).
Example:
z– {MATH}
1(∫
dX)
The notation in parentheses indicates the menu item accessed by the preceding number
key.
• 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.
• Company and product names used in this manual may be registered trademarks or
trademarks of their respective owners.
kSymbols Used in Examples
Various symbols are used in the examples of this manual to alert you to settings that need
to be configured in order to perform the example operation correctly.
• A mark like the ones shown below indicates that you need to change the calculator’s
display format setting.
If you see this: Change the display
format setting to: If you see this: Change the display format setting to:
BNatural Display bLinear Display
For details, see “Selecting the Display Format (MthIO, LineIO)” (page 11).
sin
–1
{D}
s
sin
–1
{D}
s

E-3
• A mark like the ones shown below indicates that you need to change the calculator’s
angle unit setting.
If you see this: Change the angle unit
setting to: If you see this: Change the angle unit setting to:
vDeg VRad
For details, see “Specifying the Angle Unit” (page 12).
Safety Precautions
Be sure to read the following safety precautions before using this calculator. Be sure to keep
all user documentation handy for future reference.
Caution
This symbol is used to indicate information that can result in personal injury or material
damage if ignored.
Battery
• After removing the battery from the calculator, put it in a safe place where it will not
get into the hands of small children and accidentally swallowed.
• Keep batteries out of the reach of small children. If accidentally swallowed, consult
with a physician immediately.
• Never charge the battery, try to take the battery apart, or allow the battery to become
shorted. Never expose the battery to direct heat or dispose of it by incineration.
• Improperly using a battery can cause it to leak and damage nearby items, and can
create the risk of fire and personal injury.
• Always make sure that the battery’s positive
kand negative lends are facing
correctly when you load it into the calculator.
• Remove the battery if you do not plan to use the calculator for a long time.
• Use only the type of battery specified for this calculator in this manual.
Disposing of the Calculator
• Never dispose of the calculator by burning it. Doing so can cause certain components
to suddenly burst, creating the risk of fire and personal injury.

E-4
Operating Precautions
• Be sure to press the P button on the back of the calculator before using the
calculator for the first time. See page 1 for information about the P button.
• Even if the calculator is operating normally, replace the battery at least once a year.
A dead battery can leak, causing damage to and malfunction of the calculator. Never
leave a dead battery in the calculator.
• The battery that comes with this unit 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.
• Low battery power can cause memory contents to become corrupted or lost
completely. Always keep written records of all important data.
• Avoid use and storage of the calculator in areas subjected to temperature extremes.
Very low temperatures can cause slow display response, total failure of the display,
and shortening of battery life. Also avoid leaving the calculator in direct sunlight, near a
window, near a heater or anywhere else it might be exposed to very high temperatures.
Heat can cause discoloration or deformation of the calculator’s case, and damage to
internal circuitry.
• Avoid use and storage of the calculator in areas subjected to large amounts of
humidity and dust.
Take care never to leave the calculator where it might be splashed by water or exposed to
large amounts of humidity or dust. Such conditions can damage internal circuitry.
• Never drop the calculator or otherwise subject it to strong impact.
• Never twist or bend the calculator.
Avoid carrying the calculator in the pocket of your trousers or other tight-fitting clothing
where it might be subjected to twisting or bending.
• Never try to take the calculator apart.
• Never press the keys of the calculator with a ballpoint pen or other pointed object.
• Use a soft, dry cloth to clean the exterior of the calculator.
If the calculator becomes very dirty, wipe it off with a cloth moistened in a weak solution
of water and a mild neutral household detergent. Wring out all excess liquid before wiping
the calculator. Never use thinner, benzene or other volatile agents to clean the calculator.
Doing so can remove printed markings and can damage the case.

E-5
Contents
Remove the insulation sheet! ............................................................................................. 1
Resetting the Calculator to Initial Defaults..........................................................................1
About this Manual............................................................................................................... 2
Symbols Used in Examples................................................................................................ 2
Safety Precautions ...................................................................................3
Operating Precautions.............................................................................4
Before starting a calculation... ...............................................................9
Tu r ning On the Calculator................................................................................................... 9
Key Markings...................................................................................................................... 9
Reading the Display ........................................................................................................... 9
Calculation Modes and Setup ...............................................................10
Selecting a Calculation Mode........................................................................................... 10
Calculator Setup...............................................................................................................11
Clearing the Calculation Mode and Setup Settings (Reset Setup)................................... 13
Using the Function Menu.......................................................................14
Inputting Calculation Expressions and Values....................................14
Inputting a Calculation Expression (Natural Input) ........................................................... 14
Using Natural Display....................................................................................................... 16
Editing a Calculation......................................................................................................... 19
Finding the Location of an Error ....................................................................................... 21
Displaying Decimal Results while Natural Display is Selected
as the Display Format ............................................................................21
Example Calculations....................................................................................................... 22
Using the fKey (S-D Transformation)...............................................22
Examples of S-D Transformation...................................................................................... 22
Basic Calculations..................................................................................23
Arithmetic Calculations..................................................................................................... 23
Fractions........................................................................................................................... 24
Percent Calculations......................................................................................................... 26
Degree, Minute, Second (Sexagesimal) Calculations ...................................................... 27
Calculation History and Replay.............................................................28
Accessing Calculation History .......................................................................................... 29
Using Replay .................................................................................................................... 29
Using Multi-statements in Calculations ...............................................30
Calculator Memory Operations .............................................................31
Using Answer Memory (Ans)............................................................................................ 32
Using Independent Memory ............................................................................................. 33
Using Variables ................................................................................................................ 34
Clearing All Memory Contents ......................................................................................... 35

E-6
Reserving Variable Memory...................................................................35
User Memory Area ........................................................................................................... 35
Using Extra Variables ....................................................................................................... 36
Using
π
π
and Scientific Constants..........................................................37
Pi (
π
)................................................................................................................................. 37
Scientific Constants.......................................................................................................... 38
Scientific Function Calculations ...........................................................40
Tr igonometric and Inverse Trigonometric Functions......................................................... 40
Angle Unit Conversion...................................................................................................... 41
Hyperbolic and Inverse Hyperbolic Functions .................................................................. 41
Exponential and Logarithmic Functions ...........................................................................41
Power Functions and Power Root Functions.................................................................... 42
Integration Calculation...................................................................................................... 43
Derivative.......................................................................................................................... 45
Second Derivative ............................................................................................................ 46
Σ Calculation .................................................................................................................... 46
Coordinate Conversion (Rectangular
↔
Polar) ................................................................ 47
Random Number Functions .............................................................................................49
Other Functions................................................................................................................50
Using Engineering Notation ..................................................................53
Using 10
3Engineering Notation (ENG)............................................................................ 53
ENG Conversion Examples.............................................................................................. 54
Using Engineering Symbols ............................................................................................. 54
Complex Number Calculations (COMP) ...............................................55
Inputting Complex Numbers............................................................................................. 55
Complex Number Display Setting..................................................................................... 56
Complex Number Calculation Result Display Examples .................................................. 56
Conjugate Complex Number (Conjg) ............................................................................... 57
Absolute Value and Argument (Abs, Arg)......................................................................... 57
Extracting the Real Part (ReP) and Imaginary Part (ImP) of a Complex Number............ 58
Overriding the Default Complex Number Display Format.................................................58
Matrix Calculations (COMP) ..................................................................59
Matrix Calculation Overview............................................................................................. 59
About the Mat Ans Screen ...............................................................................................59
Inputting and Editing Matrix Data ..................................................................................... 59
Performing Matrix Calculations......................................................................................... 62
Sequence Calculations (RECUR) ..........................................................65
Sequence Calculation Overview ......................................................................................65
Creating a Sequence Table .............................................................................................. 68
Sequence Calculation Precautions ..................................................................................69
Equation Calculations (EQN).................................................................69
Equation Calculation Overview ........................................................................................69
Selecting an Equation Type .............................................................................................. 71
Inputting Values for Coefficients ....................................................................................... 71

E-7
Viewing Equation Solutions.............................................................................................. 72
Statistical Calculations (SD/REG) .........................................................72
Statistical Sample Data .................................................................................................... 72
Performing Single-variable Statistical Calculations .......................................................... 75
Performing Paired-variable Statistical Calculations .......................................................... 77
Statistical Calculation Examples ......................................................................................84
Base-nCalculations (BASE-N) ..............................................................86
Performing Base-
nCalculations ....................................................................................... 86
Converting a Displayed Result to another Number Base................................................. 87
Specifying a Number Base for a Particular Value............................................................. 88
Performing Calculations Using Logical Operations and Negative Binary Values ............. 89
CALC........................................................................................................90
Using CALC...................................................................................................................... 90
SOLVE......................................................................................................92
Expressions Supported by SOLVE................................................................................... 92
Using SOLVE.................................................................................................................... 92
Creating a Number Table from a Function (TABLE) ............................94
TABLE Mode Overview.....................................................................................................94
Creating a Number Table.................................................................................................. 96
Number Table Creation Precautions................................................................................. 97
Built-in Formulas ....................................................................................97
Using Built-in Formulas .................................................................................................... 97
Built-in Formula Names.................................................................................................... 99
User Formulas................................................................................................................ 102
Program Mode (PROG).........................................................................104
Program Mode Overview................................................................................................ 105
Creating a Program ........................................................................................................ 105
Running a Program ........................................................................................................ 109
File Screen Operations................................................................................................... 111
Deleting a Program.........................................................................................................112
Command Reference............................................................................113
Program Commands ...................................................................................................... 113
Statistical Calculation Commands.................................................................................. 121
Other PROG Mode Commands......................................................................................122
Data Communication (LINK)................................................................124
Connecting Two fx-5800P Calculators to Each Other ....................................................124
Transferring Data Between fx-5800P Calculators........................................................... 124
Memory Manager (MEMORY)...............................................................126
Deletable Data Types and Supported Delete Operations............................................... 127
Using Memory Manager ................................................................................................. 127

E-8
Appendix ...............................................................................................128
Calculation Priority Sequence ........................................................................................ 128
Stack Limitations ............................................................................................................ 130
Calculation Ranges, Number of Digits, and Precision.................................................... 130
Error Messages .............................................................................................................. 132
Before assuming malfunction of the calculator... ........................................................... 135
Lower Battery Indicator ................................................................................................. 135
Power Requirements ............................................................................136
Specifications .......................................................................................137

E-9
Before starting a calculation...
kTurning On the Calculator
Press o. This displays the same screen that was on the display when you last turned off
the calculator.
AAdjusting Display Contrast
If the figures on the display become hard to read, try adjusting display contrast.
1. Press
Nc3(SYSTEM)1(Contrast).
• This displays the contrast adjustment screen.
2. Use
dand eto adjust display contrast.
3. After the setting is the way you want, press
J.
Note
You can also use
dand eto adjust contrast while the calculation mode menu that
appears when you press the
Nkey is on the display.
ATurning Off the Calculator
Press 1o(OFF).
kKey Markings
Function Key Marking Color To perform the function:
1ln Press the key.
2%Orange Press 1and then press the key.
3[ Red Press Sand then press the key.
4BIN Green In the BASE-N Mode, press the key.
kReading the Display
AInput Expressions and Calculation Results
This calculator can display both the expressions you input and calculation results on the
same screen.
%
BIN [
%
BIN [

E-10
Input expression
Calculation result
ADisplay Symbols
The symbols described below appear on the display of the calculator to indicate the current
calculation mode, the calculator setup, the progress of calculations, and more.
The nearby sample screen shows the
7symbol.
The 7symbol turns on when degrees (Deg) are selected for
the default angle unit (page 12).
Calculation Modes and Setup
kSelecting a Calculation Mode
Your calculator has 11 “calculation modes”.
ASelecting a Calculation Mode
1. Press
N.
• This displays the calculation mode menu. Use
cand fto switch between menu
screen 1 and screen 2.
Screen 1 Screen 2
2. Perform one of the following operations to select the calculation mode you want.
To select this calculation mode: Go to this screen: And press this key:
COMP (Computation)
Screen 1
1(COMP)
BASE-N (Base n)2(BASE-N)
SD (Single Variable Statistics) 3(SD)
REG (Paired Variable Statistics) 4(REG)
PROG (Programming) 5(PROG)
RECUR (Recursion) 6(RECUR)
TABLE (Tables) 7(TABLE)
EQN (Equations) 8(EQN)

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To select this calculation mode: Go to this screen: And press this key:
LINK (Communication)
Screen 2
1(LINK)
MEMORY (Memory Management) 2(MEMORY)
SYSTEM (Contrast Adjustment, Reset) 3(SYSTEM)
• To exit the calculation mode menu without changing the calculation mode, press
N.
kCalculator Setup
The calculator setup can be used to configure input and output settings, calculation
parameters, and other settings. The setup can be configured using setup screens, which
you access by pressing
1N
(SETUP). There are two setup screens, and you can use
fand cto navigate between them.
ASelecting the Display Format (MthIO, LineIO)
You can select either natural display (MthIO) or linear display (LineIO) for expressions you
input and for calculation results.
Natural Display (MthIO)
Natural display displays fraction, square root, derivative, integral, exponential, logarithmic,
and other mathematical expressions just as they are written. This format is applied both for
input expressions and for calculation results. When natural display is selected, the result of
a calculation is displayed using fraction, square root, or
π
notation whenever possible.
For example, the calculation 1 ÷ 2 produces the result
1
2, while π
÷ 3 results in 1
3π
.
Linear Display (LineIO)
With linear display, expressions and functions are input and displayed using a special format
defined by your calculator. For example,
1
2would be input as 1
{2, and log
24 would be
input as log(2,4).
When linear display is selected all calculation results, except for fractions, are displayed
using decimal values.
To select this display fomat: Perform this key operation:
Natural Display (MthIO) 1N1(MthIO)
Linear Display (LineIO) 1N2(LineIO)
Note
For information about the input procedures when using the natural display and linear
display, see “Inputting Calculation Expressions and Values” on page 14 of this manual and
the sections of this manual that explanation of each type of calculation.

E-12
ASpecifying the Angle Unit
To select this angle unit: Perform this key operation:
Degrees 1N3(Deg)
Radians 1N4(Rad)
Grads 1N5(Gra)
(90˚ = π
2radians = 100 grads)
ASpecifying the Display Digits
To specify this display digit setting: Perform this key operation:
Number of Decimal Places 1N6(Fix)0(0) to 9(9)
Significant Digits 1N7(Sci)1(1) to 9(9), 0(10)
Exponential Display Range 1N8(Norm)
1(Norm1) or
2(Norm2)
The following explains how calculation results are displayed in accordance with the setting
you specify.
• From zero to nine decimal places are displayed in accordance with the number of decimal
places (Fix) you specify. Calculation results are rounded off to the specified number of
digits.
Example: 100 ÷ 7 = 14.286 (Fix = 3)
14.29 (Fix = 2)
• After you specify the number of significant digits with Sci, calculation results are
displayed using the specified number of significant digits and 10 to the applicable power.
Calculation results are rounded off to the specified number of digits.
Example: 1 ÷ 7 = 1.4286 × 10
–1 (Sci = 5)
1.429 × 10
–1 (Sci = 4)
• Selecting Norm1 or Norm2 causes the display to switch to exponential notation whenever
the result is within the ranges defined below.
Norm1: 10
–2 > x
,
x>10
10
Norm2: 10
–9 > 
x, x>10
10
Example: 100 ÷ 7 = 14.28571429 (Norm1 or Norm2)
1 ÷ 200 = 5. × 10
–3 (Norm1)
0.005 (Norm2)
ASpecifying the Fraction Display Format
To specify this fraction format for
display of calculation results: Perform this key operation:
Mixed Fractions 1Nc1(ab/c)
Improper Fractions 1Nc2(d/c)

E-13
ASpecifying the Engineering Symbol Setting
This setting lets you turn engineering symbols on and off. For more information, see “Using
Engineering Symbols” on page 54.
To do this: Perform this key operation:
Turn engineering symbols on 1Nc3(ENG)1(EngOn)
Turn engineering symbols off 1Nc3(ENG)2(EngOff)
While engineering symbols are turned on (EngOn), engineering symbols are used when a
calculation result is outside of the range of 1 <
x< 1000.
ASpecifying the Complex Number Display Format
You can specify either rectangular coordinate format or polar coordinate format for complex
number calculation results.
To specify this complex number format
for display of calculation results: Perform this key operation:
Rectangular Coordinates 1Nc4(COMPLX)1(a+bi)
Polar Coordinates 1Nc4(COMPLX)2(r∠Ƨ)
ENG conversion (page 53) is not possible while polar coordinate format is selected.
ASpecifying the Statistical Frequency Setting
Use the key operations below to turn statistical frequency on or off during SD Mode and
REG Mode calculations (page 72).
To select this frequency setting: Perform this key operation:
Frequency On 1Nc5(STAT)
1(FreqOn)
Frequency Off 1Nc5(STAT)
2(FreqOff)
AChanging the BASE-N Mode Negative Value Setting
You can use the key operations below to enable or disable use of negative values in the
BASE-N Mode.
To specify this setting: Perform this key operation:
Negative values enabled 1Nc6(BASE-N)1(Signed)
Negative values disabled 1Nc6(BASE-N)2(Unsigned)
kClearing the Calculation Mode and Setup Settings
(Reset Setup)
Perform the following key operation to reset the calculation mode and setup settings.
Nc3(SYSTEM)2(Reset Setup)
E(Yes)
If you do not want to reset the calculator’s settings, press
J(No) in place of E(Yes) in
the above operation.

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Calculation Mode..................................... COMP
Setup Settings
Display Format .................................... MthIO
Angle Unit............................................ Deg
Exponential Display............................. Norm1
Fraction Format .................................. d/c
Complex Number Format ....................
a+bi
Engineering Symbol ............................ EngOff
Statistical Frequency ........................... FreqOff
BASE-N Negatives .............................. Signed
Using the Function Menu
The function menu provides you with access to various mathematical functions, commands,
constants, symbols, and other special operations.
ADisplaying the Function Menu
Press z. The function menu shown below will appear if you press
zwhile in the
COMP Mode for example.
AExiting the Function Menu
Press J.
Inputting Calculation Expressions
and Values
kInputting a Calculation Expression (Natural Input)
The natural input system of your calculator lets you input a calculation expression just as
it is written and execute it by pressing
E. The calculator determines the proper priority
sequence for addition, subtraction, multiplication, division, fractions and parentheses
automatically.
Example: 2 (5 + 4) – 2 × (–3) =
b
2(5+4)-
2*-3E

E-15
AInputting Scientific Functions with Parentheses (sin, cos,
',
etc.)
Your calculator supports input of the scientific functions with parentheses shown below.
Note that after you input the argument, you need to press
)to close the parentheses.
sin(, cos(, tan(, sin
–1(, cos –1(, tan –1(, sinh(, cosh(, tanh(, sinh –1(, cosh –1(, tanh –1(, log(, ln(,
e^(, 10^(, '(, 3'(, Abs(, Pol(, Rec(,
∫
(, d/dx(, d2 /dx2(, Σ (, P(, Q(, R(, Arg(, Conjg(, ReP(,
ImP(, Not(, Neg(, Det(, Trn(, Rnd(, Int(, Frac(, Intg(, RanInt#(
Example: sin 30 =
b
s30)E
Note
Some functions require a different input sequence when using natural input. For more
information, see “Inputting Calculation Expressions Using Natural Display” on page 17.
AOmitting the Multiplication Sign
You can omit the multiplication sign in the following cases.
• Immediately before an open parenthesis: 2 × (5 + 4)
• Immediately before a scientific function with parentheses: 2 × sin(30), 2 × '(3)
• Before a prefix symbol (excluding the minus sign): 2 × h123
• Before a variable name, constant, or random number: 20 × A, 2 × π , 2 × i
AFinal Closed Parenthesis
You can omit one or more closed parentheses that come at the end of a calculation,
immediately before the
wkey is pressed.
Example: (2 + 3) (4 − 1) = 15
b
(2+3)
(4-1E
ACalculation Expression Wrapping (Linear Display)
When using linear display, calculation expressions that are longer than 16 characters
(numbers, letters, and operators) are wrapped automatically to the next line.
Example: 123456789 + 123456789 = 246913578
b
123456789+
123456789E

E-16
ANumber of Input Characters (Bytes)
As you input a mathematical expression, it is stored in memory called an “input area,”
which has a capacity of 127 bytes. This means you can input up to 127 bytes for a single
mathematical expression.
When linear display is selected as the display format, each function normally uses one or
two bytes of memory. With the natural display format, each function use four or more bytes
of memory. For more information, see “Inputting Calculation Expressions Using Natural
Display” on page 17.
Normally, the cursor that indicates the current input location on the display is either a
fl ashing vertical bar (
|
) or horizontal bar ( ). When the remaining capacity of the input area
is 10 bytes or less, the cursor changes to a flashing box (
k
).
If this happens, stop input of the current expression at some suitable location and calculate
its result.
kUsing Natural Display
While natural display is selected as the display format (page 11), you can input fractions
and some scientific functions just as they are written.
ANatural Display Basics
The table below lists the types of scientific functions that you can input using natural display
format.
• The *1 column shows the number of bytes of memory used up by each scientific function.
See “Number of Input Characters (Bytes)” (page 16) for more information.
• For information about the *2 column, see “Using Values and Expressions as Arguments”
(page 18).
Scientific Functions that Support Natural Display
Function Key Operation *1 *2
Improper Fraction '9Yes
Mixed Fraction 1'(()14No
log(a,b) z– {MATH}
c7(logab) 7 Yes
10^x1l($)4Yes
e ^x1i(%)4Yes
Square Root (
')!4Yes
Cube Root (
3')1((#)9Yes
Square x4No
Reciprocal 1)(x–1)5No
Power 64Yes
Power Root 16(")9Yes
Absolute Value (Abs) z– {MATH}
c1(Abs) 4 Yes
Integral z– {MATH}
1(∫
dX) 8 Yes

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Function Key Operation *1 *2
Derivative z– {MATH}
2(d/dX) 7 Yes
Second Derivative z– {MATH}
3(d2/dX2)7Yes
Σ Calculation z– {MATH}
4(Σ
() 11 Yes
Note
If you include values or expressions in parentheses (
(and )) while using natural
display, the height of the parentheses will adjust automatically depending on whether they
enclose one line or two lines. Regardless of their height, opening and closing parentheses
take up one byte of memory each.
Inputting Calculation Expressions Using Natural Display
1. To input a specific function, perform the operation in the “Key Operation” column of the
“Scientific Functions that Support Natural Display” table.
2. At the input fields indicated by

, input the required values and expressions.
• Use the cursor keys to move between the input fields of the expression.
Example: To input 1 + 2
2 × 3
B
Specify fraction input:
'
Input the numerator:
1+2
Move the cursor to the denominator:
c
Input the denominator:
2*3
Execute the calculation:
E
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 × 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.

E-18
AScrolling the Screen Left and Right
The screen will show up to 14 characters when inputting with natural display. When you
input more than 14 characters, the screen will scroll automatically. If this happens, the
]
symbol will turn on to let you know that the expression runs off the left side of the display.
BInput expression 1111 + 2222 + 3333 + 444
Displayed expression
Cursor
• While the
]symbol is turned on, you can use the dkey to move the cursor to the left
and scroll the screen.
• Scrolling to the left causes part of the expression to run off the right side of the display,
which is indicated by the
'symbol on the right. While the 'symbol is on the screen, you
can use the ekey to move the cursor to the right and scroll the screen.
AUsing Values and Expressions as Arguments
When inputting with natural display, in certain cases you can use a value or an expression
that is enclosed in parentheses that you have already input as the argument of a scientific
function (such as '), the numerator of a fraction, etc. For the sake of explanation here,
a natural display function that supports the use of previously input values or parenthetical
expressions is called an “insertable natural display function”.
Example: To insert the natural display function
'into the parenthetical expression in the
following calculation: 1 + (2 + 3) + 4
B(Move the cursor immediately to the left of
the parenthetical expression.)
1Y(INS)
!
Note
• Not all natural display functions are insertable. Only the scientific functions for which
“Yes” appears in the column of the table under “Scientific Functions that Support Natural
Display” (page 16) are insertable.
• The cursor can be immediately to the left of a parenthetical expression, a numeric value,
or a fraction. Inserting an insertable function will make the parenthetical expression, value,
or fraction the argument of the inserted function.
• If the cursor is located immediately to the left of a scientific function, the entire function
becomes the argument of the inserted function.

E-19
kEditing a Calculation
AInsert Mode and Overwrite Mode
The calculator has two input modes. The insert mode inserts your input at the cursor
location, shifting anything to the right of the cursor to make room. The overwrite mode
replaces the key operation at the cursor location with your input.
Only the insert mode is available when natural display is selected as the display format.You
cannot change to the overwrite mode. When linear display is selected as the display format,
you can choose either the insert mode or overwrite mode for input.
Original Expression Pressing +
Insert Mode Cursor
Overwrite Mode Cursor
A vertical cursor (
|
) indicates the insert mode, while a horizontal cursor ( ) indicates the
overwrite mode.
Selecting an Input Mode
The initial default input mode setting is insert mode. If you have linear display selected as
the display format and want to change to the overwrite mode, press:
1Y(INS).
AEditing a Key Operation You Just Input
When the cursor is located at the end of the input, press Yto delete the last key operation
you performed.
Example: To correct 369 × 13 so it becomes 369 × 12
Bb 369*13
Y
2
ADeleting a Key Operation
With the insert mode, use
dand eto move the cursor to the right of the key operation
you want to delete and then press
Y. With the overwrite mode, move the cursor to the
key operation you want to delete and then press
Y. Each press of Ydeletes one key
operation.
Example: To correct 369 × × 12 so it becomes 369 × 12
Insert Mode
Bb 369**12