Casio fx-82EX User Manual
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User's Guide
CASIO Worldwide Education Website
Be sure to keep all user documentation handy for future


Table of Contents

Summary of Contents for Casio fx-82EX

  • Page 1 User’s Guide CASIO Worldwide Education Website Be sure to keep all user documentation handy for future reference. RJA532417-001V01...
  • Page 2: Table Of Contents

    Technical Information................19 ■■ Frequently Asked Questions ■■............22 • 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.
  • Page 3: About This Manual

    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. •...
  • Page 4: Getting Started

    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.
  • Page 5: Calculation Mode

    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.
  • Page 6: Input And Output Formats

    General calculations (Calculate) Statistical and regression calculations (Statistics) Generate a number table based on one (Table) or two functions 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...
  • Page 7: Configuring The Calculator Setup

    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 left of the item whose setting you want to change.
  • Page 8: Inputting Expressions And Values

    Up to four lines can be displayed while Normal Font is selected, and up to six lines can be displayed with Small Font. To initialize calculator settings (except the Contrast setting) (RESET)(Setup Data)(Yes) Inputting Expressions and Values Basic Input Rules When you press ...
  • Page 9 Permutation (nPr), combination (nCr) 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 x 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.
  • Page 10: Toggling Calculation Results

    176(INS)  Pressing (INS) in the above example causes to 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.
  • Page 11: Percent Calculations

    Note • Mixing fractions and decimal values in a calculation while something other than MathI/MathO is selected will cause the result to be displayed as a decimal value. • Fractions in calculation results are displayed after being reduced to their lowest terms.
  • Page 12: Calculation History And Replay

    • One of the prime factors of the value is 1,018,081 or greater. • Two or more of the prime factors of the value have more than three digits. The part that cannot be factored will be enclosed in parentheses on the display.
  • Page 13: Function Calculations

    0(A) *1 Input a variable as shown here: press  and then press the key that corresponds to the desired variable name. *2 Pressing (RECALL) displays a screen that shows the values currently assigned to variables A, B, C, D, E, F, M, x, and y. On this screen, values are always displayed using the “Norm 1”...
  • Page 14 (π)2(Angle Unit)( ) *2 Depending on the calculation mode, you should press . , : Exponential functions. × 2 = 296.8263182 296.8263182 () 52 (MathI/MathO) 296.8263182 () 52 (LineI/LineO) log: Logarithmic function. Use  to input log b as log (a, b). Base 10 is the default setting if you do not input anything for a.
  • Page 15: Statistical Calculations

    Ran#: Function that generates a pseudo random number in the range of 0.000 to 0.999. The result is displayed as a fraction when MathI/MathO is selected for Input/Output on the setup menu. To obtain random three-digit integers 1000(Ran#) (The result differs with each execution.) RanInt#: Function that generates a pseudo random integer between a specified start value and end value.
  • Page 16 Note: When you want to change the calculation type after entering the Statistics Mode, perform the key operation (Select Type) to display the calculation type selection screen. Inputting Data with Statistics Editor Statistics Editor displays one, two, or three columns: single-variable (x), single variable and frequency (x, Freq), paired-variable (x, y), paired- variable and frequency (x, y, Freq).
  • Page 17 Obtaining Statistical Values from Input Data You can use the operations in this section to recall statistical values , Σx assigned to variables (σ , etc.) based on the data you input with the Statistics Editor. You can also use the variables in calculations. The operations in this section are performed on the statistical calculation screen that appears when you press ...
  • Page 18: Creating A Number Table

    0.998 (Regression)(r) -3857.984 (Regression)(a) 2357.532 (Regression)(b) Calculating Estimated Values Based on the regression formula obtained by paired-variable statistical calculation, the estimated value of y can be calculated for a given x-value. The corresponding x-value (two values, x and x , in the case of quadratic regression) also can be calculated for a value of y in the regression formula.
  • Page 19: Errors

    • If there is value in the x cell above the currently highlighted x cell, pressing  or  automatically inputs into the highlighted cell the value equal to the value of the cell above it plus the step value. So also, pressing ...
  • Page 20: Before Assuming Malfunction Of The Calculator

    → Narrow the table calculation range by changing the Start, End, and Step values, and try again. Before Assuming Malfunction of the Calculator... Note that you should make separate copies of important data before performing these steps. 1. Check the calculation expression to make sure that it does not contain any errors.
  • Page 21 In general, ±1 at the 10th digit for a single calculation. Precision for exponential display is Precision ±1 at the least significant digit. Errors are cumulative in the case of consecutive calculations. Function Calculation Input Ranges and Precision Functions Input Range 0 ≦...
  • Page 22: Specifications

    π form. Specifications Power Requirements: fx-82EX: AAA-size battery R03 (UM-4) × 1 fx-350EX: AAA-size battery LR03 (AM4) × 1 fx-85EX: Built-in solar cell; button battery LR44 × 1 Approximate Battery Life (based on one hour of operation per day):...
  • Page 23: Frequently Asked Questions

    Contrast setting): (RESET)(Setup Data)(Yes). When I execute a function calculation, why do I get a calculation result that is completely different from older CASIO calculator models? → With a Natural Textbook Display model, the argument of a function that uses parentheses must be followed by a closing parenthesis.
  • Page 24 CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan Responsible within the European Union: CASIO EUROPE GmbH Casio-Platz 1 22848 Norderstedt, Germany This mark applies in EU countries only. SA1412-A Printed in China © 2015 CASIO COMPUTER CO., LTD.

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