Casio Fx-82AR X Manual de usuario

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User’s Guide

CASIO Worldwide Education Website

http://world.casio.com/manual/calc

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fx-95AR X

fx-82AR X

CONTENTS

About this Manual......................................................................................2

Initializing the Calculator........................................................................... 2

Precautions................................................................................................2

Getting Started.......................................................................................... 3

Calculation Mode.......................................................................................4

Input and Output Formats......................................................................... 5

Conﬁguring the Calculator Setup.............................................................. 6

Inputting Expressions and Values............................................................. 7

Toggling Calculation Results..................................................................... 9

Basic Calculations................................................................................... 10

Calculation History and Replay............................................................... 11

Using Memory Functions.........................................................................11

Function Calculations.............................................................................. 12

Statistical Calculations.............................................................................15

Equation Calculations (fx-95AR X only)...................................................17

Creating a Number Table........................................................................ 19

Inequality Calculations (fx-95AR X only)................................................. 20

Ratio Calculations (fx-95AR X only).........................................................20

Errors....................................................................................................... 21

Before Assuming Malfunction of the Calculator... .................................22

Replacing the Battery.............................................................................. 22

Technical Information...............................................................................22

■■ Frequently Asked Questions ■■.........................................................25

• 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.

About this Manual

• Unless speciﬁcally stated, all sample operations in this manual 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.

• The contents of this manual are subject to change without notice.

• 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.

• Company and product names used in this manual may be registered

trademarks or trademarks of their respective owners.

Initializing the Calculator

Perform the following procedure when you want to initialize the calculator

and return the calculation mode and setup (except Language and Contrast

settings) to their initial default settings. Note that this operation also clears

all data currently in calculator memory.

(RESET)(Initialize All)(Yes)

Precautions

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. A dead battery can leak, causing damage to and

malfunction of the calculator.

• 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.

• Avoid use and storage of the calculator in areas subjected to

temperature extremes, and large amounts of humidity and dust.

• 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.

Getting Started

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

(OFF) to turn off the calculator.

Note: The calculator also will turn off automatically after approximately 10

minutes of non-use. Press the key to turn the calculator back on.

Adjusting Display Contrast

Display the Contrast screen by performing the key operation below:

(SETUP)*1or *2(Contrast). Next, use and to

adjust contrast. After the setting is the way you want, press .

*1: fx-82AR X *2: fx-95AR X

Important: If adjusting display contrast does not improve display

readability, it probably means that battery power is low. Replace the battery.

Key Markings

Pressing the or key followed by a second key

performs the alternate function of the second key. The alternate

function is indicated by the text printed above the key.

(1) Keycap function (2) Alternate function

This color: Means this:

Yellow Press and then the key to access the

applicable function.

Red

Press and then the key to input the

applicable variable, constant, function, or

symbol.

Reading the Display

• If a or indicator appears on the right side of either the input

expression line or calculation result line, it means the displayed line

continues to the right. Use and to scroll the line display. Note that

if you want to scroll the input expression while both the and 

indicators are displayed, you will need to press ﬁrst and then use 

and to scroll.

• The table below describes some of the typical indicators that appear at

the top of the screen.

The keypad has been shifted by pressing the key. The

keypad will unshift and this indicator will disappear when you

press a key.

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.

//Indicates the current setting of Angle Unit (: Degree, :

Radian, or : Gradian) on the setup menu.

FIX A ﬁxed number of decimal places is in effect.

SCI A ﬁxed number of signiﬁcant digits is in effect.

MThere 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 .

Indicates that MathI/MathO or MathI/DecimalO is selected for

Input/Output on the setup menu.

The display currently shows an intermediate result of a multi-

statement calculation.

Using Menus

Some of the operations of this calculator are performed using menus.

Menus are displayed by pressing or and then (SETUP).

General menu operation operations are described below.

• You can select a menu item by pressing the number key that

corresponds to the number to its right*1or left*2on the menu screen.

*1*2

• A vertical scroll bar (1) indicates that the menu runs off the screen. In this

case, you can use and to scroll the menu up and down. A right*1

or left*2arrow (2) indicates that the currently displayed menu is a sub-

menu. To return from a sub-menu to its parent menu, press *1or

*2.

• To close a menu without selecting anything, press .

*1 Language: Arabic *2 Language: English

Calculation Mode

Specify the calculation mode that is suitable for the type of calculation you

want to perform.

1. Press  to display the Main Menu.

2. Use the cursor keys to move the

highlighting to the icon you want.

(Example: fx-95AR X)

For this: Select this icon:

General calculations (Calculate)

Statistical and regression calculations (Statistics)

Generate a number table based on one

or two functions (Table)

Equation and function calculations (Equation/Func)*

Inequality calculations (Inequality)*

Ratio calculations (Ratio)*

* fx-95AR X only

3. Press to display the initial screen of the mode whose icon you

selected.

Note: The initial default calculation mode is the Calculate Mode.

Input and Output Formats

Before starting a calculation on the calculator, you should ﬁrst use the

operations in the table below to specify the formats that should be applied

for calculation formula input and calculation result output.

To specify this type of input and output:

Press (SETUP)



(Input/Output) and then

press:

Input: Natural Textbook; Output: Format that

includes a fraction, √, or π*1(MathI/MathO)

Input: Natural Textbook; Output: Converted

to decimal value (MathI/DecimalO)

Input: Linear*2; Output: Decimal or fraction (LineI/LineO)

Input: Linear*2; Output: Converted to

decimal value (LineI/DecimalO)

*1 Decimal output is applied when these formats cannot be output for

some reason.

*2 All calculations, including fractions and functions are input in a single

line. Same output format as that for models without Natural Textbook

Display (S-V.P.A.M. models, etc.)

Input/Output Format Display Examples

MathI/MathO

MathI/DecimalO

LineI/LineO

LineI/DecimalO

Note: The initial default input/output format setting is MathI/MathO.

Conﬁguring the Calculator Setup

To change the calculator setup

1. Press (SETUP) to display the setup menu.

2. Use and to scroll the setup menu, and then input the number

displayed to the right*1 or left*2 of the item whose setting you want to

change.

*1 Language: Arabic *2 Language: English

Items and Available Setting Options

“◆” indicates the initial default setting.

Input/Output 



MathI/MathO◆;



MathI/DecimalO;



LineI/LineO;



LineI/DecimalO Speciﬁes the format to be used by the calculator for

formula input and calculation result output.

Angle Unit



Degree◆;



Radian;



Gradian Speciﬁes degree,

radian or gradian as the angle unit for value input and calculation result

display.

Number Format 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: 1007(≈)* 14.286 (Fix 3)



Sci: The value you specify (from 0 to 9) controls the number of

signiﬁcant digits for displayed calculation results. Calculation results are

rounded off to the speciﬁed digit before being displayed.

Example: 17(≈)* 1.4286 × 10-1 (Sci 5)



Norm: Displays calculation results in exponential format when they fall

within the ranges below.



Norm 1◆:10-2 > |x|, |x| ≧1010,



Norm 2: 10-9 > |x|, |x| ≧1010

Example: 1200(≈)* 5 × 10-3 (Norm 1), 0.005 (Norm 2)

* Pressing (≈) instead of after inputting a calculation will display

the calculation result in decimal form.

Fraction Result



ab/c;



d/c◆Speciﬁes either mixed fraction or

improper fraction for display of fractions in calculation results.

Complex (fx-95AR X only)



a+bi◆;



∠

θSpeciﬁes either rectangular

coordinates or polar coordinates for Equation/Func Mode solutions.

Note: An iindicator is displayed at the top of the screen while a+biis

selected for the Complex setting. ∠is displayed while r∠θis selected.

Statistics 



On;



Off◆Speciﬁes whether or not to display a Freq

(frequency) column in the Statistics Mode Statistics Editor.

Equation/Func (fx-95AR X only)



On◆;



Off Speciﬁes whether or not

to use complex numbers in solutions output in the Equation/Func Mode.

Table



f(x);



f(x),g(x)◆Speciﬁes whether to use function f(x) only or

the two functions f(x) and g(x) in the Table Mode.

Decimal Mark



Dot◆;



Comma Speciﬁes whether to display a dot or

a comma for the calculation result decimal mark. A dot is always displayed

during input.

Note: When dot is selected as the decimal mark, the separator for multiple

results is a comma (,). When comma is selected, the separator is a

semicolon (;).

Digit Separator



On;



Off◆Speciﬁes whether or not a separator

character should be used in calculation results.

MultiLine Font



Normal Font◆;



Small Font Speciﬁes the display

font size when LineI/LineO or LineI/DecimalO is selected for Input/Output.

Up to four lines can be displayed while Normal Font is selected, and up to

six lines can be displayed with Small Font.

Language



English;



Arabic◆Speciﬁes the language to be used for

calculator menus and messages.

To initialize calculator settings (except the Contrast setting)

(RESET)(Setup Data)(Yes)

Inputting Expressions and Values

Basic Input Rules

When you press the priority sequence of the input calculation will be

evaluated automatically and the result will appear on the display.

4 × sin 30 × (30 + 10 × 3) = 120

*1 Input of the closing parenthesis is required for sin and other functions

that include parentheses.

*2 These multiplication symbols (×) can be omitted.

*3 The closing parenthesis immediately before the operation can be

omitted.

Note

• The cursor will change shape to when there are 10 bytes or less of

allowed input remaining. If this happens, end calculation input and then

press .

• If you execute a calculation that includes both division and multiplication

operations in which a multiplication sign has been omitted, parentheses

will be inserted automatically as shown in the examples below.

- When a multiplication sign is omitted immediately before an open

parenthesis or after a closed parenthesis.

Example: 6 ÷ 2 1 + 2 6 ÷ 21 + 2

- When a multiplication sign is omitted immediately before a variable, a

constant, etc.

Example: 2÷2 2 2 ÷ 2 2

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.

1 Parenthetical expressions

Functions that have parentheses (sin(, log(, etc., functions that take

an argument to the right, functions that require a closing parenthesis

after the argument)

3Functions that come after the input value (𝑥2, 𝑥3, 𝑥-1, 𝑥!, °’ ”, °, r, g, %),

powers (), roots ( )

4 Fractions

5 Negative sign ((-))

6Statistics Mode estimated values (𝑥, 𝑦, 𝑥1, 𝑥2)

7 Multiplication where the multiplication sign is omitted

8Permutation (nPr), combination (nCr)

9 Multiplication (×), division (÷)

10 Addition (+), subtraction (−)

Note: When squaring a negative value (such as -2), the value being

squared must be enclosed in parentheses (2). Since x2has

a higher priority than the negative sign, inputting 2 would 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.

Inputting an Expression Using Natural Textbook

Format (MathI/MathO or MathI/DecimalO Only)

Formulas and expressions that include fractions and/or special functions

such as √can be input in natural textbook format by using templates that

appear when certain keys are pressed.

Example: 31

2+53

1. Press ().

• This inputs a mixed fraction template.

2. Input values into the integer, numerator, and denominator areas of the

template.

312

3. Do the same to input the remainder of the expression.

() 532

Tip: While the input cursor is located within the input area of a template

(mixed fractions), pressing  jumps to the position immediately

following (to the right) of the template, while pressing  jumps to the

position immediate before (to the left of) it.

Note

• When you press and obtain a calculation result, part of the

expression you input may be cut off. If you need to view the entire input

expression again, press and then use and to scroll the input

expression.

• Nesting of functions and parentheses is allowed. Further input will

become impossible if you nest too many functions and/or parentheses.

To undo operations (MathI/MathO or MathI/DecimalO only): To undo the

last key operation, press (UNDO). To redo a key operation you have

just undone, press (UNDO) again.

Using Values and Expressions as Arguments (MathI/

MathO or MathI/DecimalO only)

Example: To input 1+ 7

6and then change it to 1+ 7

176(INS)



Pressing (INS) in the above example causes 7

6to be the argument

of the function input by the next key operation (√).

Overwrite Input Mode (LineI/LineO or LineI/DecimalO

only)

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 “” in the

insert mode and as “” in the overwrite mode.

Toggling Calculation Results

While MathI/MathO or MathI/DecimalO is selected for Input/Output on the

setup menu, each press of will toggle the currently displayed

calculation result between its fraction form and decimal form, its √form

and decimal form, or its πform and decimal form.

𝜋÷6= 1

6𝜋=0.5235987756 (MathI/MathO)

(π)61

6π←→0.5235987756

2+2 ×3=5.913591358 = 6+2 3 (MathI/DecimalO)

2235.913591358 ←→6+2 3

Regardless of what is selected for Input/Output on the setup menu, each

press of will toggle the currently displayed calculation result between its

decimal form and fraction form.

Important

• With certain calculation results, pressing the  key will not convert the

displayed value.

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