Summary of Contents

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PLUS fx991ES PLUS User’s Guide CASIO Worldwide Education Website http://edu.casio.com CASIO EDUCATIONAL FORUM http://edu.casio.com/forum/...

Page 2: Table Of Contents
Scientific Constants ... 35 Metric Conversion ... 37 Calculation Ranges, Number of Digits, and Precision ... 38 Errors ... 40 Before Assuming Malfunction of the Calculator..41 Replacing the Battery... 42 Specifications ... 42 Frequently Asked Questions ... 43...

Page 3: Important Information, Sample Operations, Initializing The Calculator, Safety Precautions, Handling Precautions
• 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.

Page 4: Removing The Hard Case, Turning Power On And Off, Adjusting Display Contrast, Key Markings
• 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.

Page 5: Reading The Display
There is a value stored in independent memory. The calculator is standing by for input of a variable name to assign a value to the variable. This indicator appears after you press The calculator is standing by for input of a variable name to recall the variable’s value.

Page 6: Using Menus, Specifying The Calculation Mode, Configuring The Calculator Setup
(without any value) while it performs the calculation internally. Using Menus Some of the calculator’s operations are performed using menus. Pressing , for example, will display a menu of applicable functions. The following are the operations you should use to navigate between menus.

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Note: • The calculator switches to Linear Display automatically whenever you enter the STAT, BASEN, MATRIX, or VECTOR Mode. • In this manual, symbol next to a sample operation indicates Natural Display, while symbol indicates Linear Display.

Page 8: Inputting Expressions And Values
Initializing Calculator Settings Perform the following procedure to initialize the calculator, which returns the calculation mode to COMP and returns all other settings, including setup menu settings, to their initial defaults. (CLR) (Setup) Inputting Expressions and Values Basic Input Rules Calculations can be input in the same form as they are written.

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Parenthetical expressions Functions that require an argument to the right and a closing parenthesis “)” following the argument. Functions that come after the input value ( ), powers ( Fractions Negative sign (–), base Note: When squaring a negative value (such as –2), the value being squared must be enclosed in parentheses ( ).

Page 10: Toggling Calculation Results
Using Values and Expressions as Arguments (Natural Display only) A value or an expression that you have already input can be used as the argument of a function. After you have input it the argument of To input 1 + 7 As shown above, the value or expression to the right of the cursor after (INS) are pressed becomes the argument of the function that is specified next.

Page 11: Basic Calculations
÷ 6 = 1 = 0.5235987756 ( ' 2 + 2) ' 3 = ' 6 + 2 ' 3 = 5.913591358 While Linear Display is selected, each press of displayed calculation result between its decimal form and fraction form. 1 ÷...

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Percent Calculations Inputting a value and pressing a percent. 20% = 30 Calculate what percentage of 880 is 660. (75%) Increase 2500 by 15%. (2875) Discount 3500 by 25%. (2625) Degree, Minute, Second (Sexagesimal) Calculations Performing an addition or subtraction operation between sexagesimal values, or a multiplication or division operation between a sexagesimal value and a decimal value will cause the result to be displayed as a sexagesimal value.

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Transform the value 123 to engineering notation, shifting the decimal point to the left. Calculation History In the COMP, CMPLX, or BASEN Mode, the calculator remembers up to approximately 200 bytes of data for the newest calculation. You can scroll through calculation history contents using...

Page 14: Function Calculations
Variables (A, B, C, D, E, F, X, Y) Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You can assign values to variables and also use the variables in calculations. To assign the result of 3 + 5 to variable A...

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°, : These functions specify the angle unit. ° specifies degrees, grads. Input a function from the menu that appears when you perform the following key operation: : Exponential functions. Note that the input method is different depending upon whether you are using Natural Display or Linear Display. log : Logarithmic function.

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Fix and Sci, the argument is rounded off to the specified digit. When Fix 3 is the display digits setting, for example, the result of 10 ÷ 3 is displayed as 3.333, while the calculator maintains a value of 3.33333333333333 (15 digits) internally for calculation. In the case of Rnd(10÷3) = 3.333 (with Fix 3), both the displayed value and the calculator’s internal value become...

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Tips for Successful Integration Calculations When a periodic function or integration interval results in positive and negative ) function values Perform separate integrations for each cycle, or for the positive part and the negative part, and then combine the results. Positive Positive When integration values fluctuate widely due to minute shifts in the...

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To calculate ' 2 × 3 (= 3 ' 2 = 4.242640687...) to three decimal places (Fix 3) (SETUP) (Fix) ) = 1 To obtain the derivative at point + 1) = 20 To convert rectangular coordinates ( ' 2 , ' 2 ) to polar coordinates To convert polar coordinates ( ' 2 , 45°) to rectangular coordinates (5 + 3) ! = 40320 2 –...

Page 19: Complex Number Calculations (cmplx)
To generate random integers in the range of 1 to 6 (Results shown here are for illustrative purposes only. Actual results will differ.) To determine the number of permutations and combinations possible when selecting four people from a group of 10 Permutations: Combinations: To perform the following calculations when Fix 3 is selected for the...

Page 20: Using Calc
Using a Command to Specify the Calculation Result Format Either of two special commands ( of a calculation to specify the display format of the calculation results. The command overrides the calculator’s complex number format setting. ' 2 + ' 2 ( ) 45 Using CALC...

Page 21: Using Solve
To store A + B r θ coordinates ( Note: During the time from when you press pressing , you should use Linear Display input procedures for input. Using SOLVE SOLVE uses Newton’s Law to approximate the solution of equations. Note that SOLVE can be used in the COMP Mode ( The following describes the types of equations whose solutions can be obtained using SOLVE.

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Input an initial value for X (Here, input 1): Note: During the time from when you press SOLVE by pressing for input. Important: • Depending on what you input for the initial value for X (solution variable), SOLVE may not be able to obtain solutions. If this happens, try changing the initial value so they are closer to the solution.

Page 23: Statistical Calculations (stat)
Input an initial value for X (Here, input 1): 1 Statistical Calculations (STAT) To start a statistical calculation, perform the key operation to enter the STAT Mode and then use the screen that appears to select the type of calculation you want to perform. To select this type of statistical calculation: (Regression formula shown in parentheses) Press this key: Singlevariable (X)

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Note: Use the FREQ (frequency) column to input the quantity (frequency) of identical data items. Display of the FREQ column can be turned on (displayed) or off (not displayed) using the Stat Format setting on the setup menu. To select linear regression and input the following data: (170, 66), (173, 68), (179, 75) Important: •...

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• See the table at the beginning of this section of the manual for the regression formulas. • , are not variables. They are commands of the type that take an argument immediately before them. See “Calculating Estimated Values” for more information. Minimum Value: minX*, minY, Maximum Value: maxX*, maxY (STAT) Note: While singlevariable statistical calculation is selected, you can input...

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Calculating Estimated Values Based on the regression formula obtained by pairedvariable statistical calculation, the estimated value of The corresponding regression) also can be calculated for a value of formula. To determine the estimate value for regression formula produced by logarithmic regression of the data .

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(STAT) Results: Normalized variate ( Base Calculations (BASEN) Press (BASEN) to enter the BASEN Mode when you want to perform calculations using decimal, hexadecimal, binary, and/or octal values. The initial default number mode when you enter the BASEN Mode is decimal, which means input and calculation results use the decimal number format.

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Logical and Negation Operations Your calculator provides you with logical operators (and, or, xor, xnor) and functions (Not, Neg) for logical and negation operations on binary values. Use the menu that appears when you press logical operators and functions.

Page 29: Equation Calculations (eqn)
(BASE) Note: In the case of a negative binary, octal or hexadecimal value, the calculator converts the value to binary, takes the two’s complement, and then converts back to the original number base. For decimal (base10) values, the calculator merely adds a minus sign.

Page 30: Matrix Calculations (matrix)
EQN Mode Calculation Examples = 3, 2 (EQN) – = 2, (EQN) 3 = 0 (EQN) – 2 ' 2 + 2 = 0 (EQN) – 2 – + 2 = 0 (EQN) Matrix Calculations (MATRIX) Use the MATRIX Mode to perform calculations involving matrices of up to 3 rows by 3 columns.

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1. Press (MATRIX) to enter the MATRIX Mode. 2. Press (MatA) • This will display the Matrix Editor for input of the elements of the 2 specified for MatA. 3. Input the elements of MatA: 2 4. Perform the following key operation: (MatB) (2 2).

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3. Use the Matrix Editor that appears to input the elements of the matrix. 1 0 –1 To assign 0 –1 1 To edit the elements of a matrix variable: 1. Press (MATRIX) select the matrix variable you want to edit. 2.

Page 33: Creating A Number Table From A Function (table)
Obtain the absolute value of each element of MatB (Abs(MatB)). Determine the square and cube of MatA (MatA Note: You cannot use ) to specify cubing. Creating a Number Table from a Function (TABLE) TABLE generates a number table for Perform the following steps to generate a number table.

Page 34: Vector Calculations (vector)
Note: • You can use the number table screen for viewing values only. Table contents cannot be edited. • The number table generation operation causes the contents of variable X to be changed. Important: The function you input for number table generation is deleted whenever you display the setup menu in the TABLE Mode and switch between Natural Display and Linear Display.

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Vector Answer Memory Whenever the result of a calculation executed in the VECTOR Mode is a vector, the VctAns screen will appear with the result. The result also will be assigned to a variable named “VctAns”. The VctAns variable can be used in calculations as described below. •...

Page 36: Scientific Constants
(SETUP) VctA Scientific Constants Your calculator comes with 40 builtin scientific constants that can be used in any mode besides BASEN. Each scientific constant is displayed as a unique symbol (such as ), which can be used inside of calculations.

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To input the scientific constant C display its value To calculate C The following shows the twodigit numbers for each of the scientific constants. 01: (mp) proton mass 03: (me) electron mass 05: (a ) Bohr radius μ 07: ( N) nuclear magneton 09: ( ) Planck constant, rationalized...

Page 38: Metric Conversion
The values are based on CODATA recommended values (March 2007). Metric Conversion The calculator’s builtin metric conversion commands make it simple to convert values from one unit to another. You can use the metric conversion commands in any calculation mode except for BASEN and TABLE.

Page 39: Calculation Ranges, Number Of Digits And Precision
25: atm 26: Pa 29: hp 30: kW 33: kgf 34: J • 37: °F °C 38: °C Conversion formula data is based on the “NIST Special Publication 811 (1995)”. Note: The J cal command performs conversion for values at a temperature of 15°C.

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–1 tanh –9.999999999 –9.999999999 –1 Pol( Rec( , θ) θ: Same as sin °’ ” The display seconds value is subject to an error of 1 at the second decimal place. Decimal 0°0 0˝ = 0: However: –1 = 0: However: –1 Total of integer, numerator, and denominator must be 10 digits or less (including division marks).

Page 41: Errors
Errors The calculator will display an error message whenever an error occurs for any reason during a calculation. There are two ways to exit an error message display: Pressing to clear the message and calculation. Displaying the Location of an Error While an error message is displayed, press calculation screen.

Page 42: Before Assuming Malfunction Of The Calculator
3. If the above steps do not correct your problem, press the cause the calculator to perform a routine that checks whether calculation functions are operating correctly. If the calculator discovers any abnormality, it automatically initializes the calculation mode and clears memory contents.

Page 43: Replacing The Battery, Specifications
PLUS: AAAsize battery R03 (UM4) fx991ES PLUS: Builtin solar cell; button battery LR44 (GPA76) Approximate Battery Life: fx570ES PLUS: 17,000 hours (continuous display of flashing cursor) fx991ES PLUS: 3 years (based on one hour of operation per day) Power Consumption: 0.0002 W (fx570ES PLUS) Operating Temperature: 0°C to 40°C (32°F to 104°F)

Page 44: Frequently Asked Questions
Approximate Weight: fx570ES PLUS: 100 g (3.5 oz) including the battery fx991ES PLUS: 95 g (3.4 oz) including the battery Frequently Asked Questions How can I perform input and display results the same way I did on a model that does not have Natural Textbook Display? Perform the following key operation: “Configuring the Calculator Setup”...

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Manufacturer: CASIO COMPUTER CO., LTD. 62, Honmachi 1chome Shibuyaku, Tokyo 1518543, Japan Responsible within the European Union: CASIO EUROPE GmbH Bornbarch 10 22848 Norderstedt, Germany This mark applies in EU countries only.

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CASIO COMPUTER CO., LTD. 62, Honmachi 1chome Shibuyaku, Tokyo 1518543, Japan SA0802A...
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