Home » Casio » Calculators » Casio fx 991MS

Casio fx 991MS Support Question

Find answers below for this question about Casio fx 991MS - Scientific Display Calculator.
Need a Casio fx 991MS manual? We have 1 online manual for this item!

Casio Overview Questions Manuals Reviews Videos Research

Question posted by harshrocks29683 on April 4th, 2013

Regarding The Dead Keys On Calc....

I have the question that ,how to fix the dead keys on the casio 991ms calculator.. Please tell me the steps .... Hoping for quick reply.....

I Know the Answer!

I have the same question
Request More Information

Current Answers

There are currently no answers that have been posted for this question.
Be the first to post an answer!

Remember that you can earn up to 1,100 points for every answer you submit. The better the quality of your answer, the better chance it has to be accepted.

Related Casio fx 991MS Manual Pages

User Guide - Page 4

...symbol is used to indicate information that can cause certain components to use the calculator for a long time (fx-95MS/100MS/570MS). • Use only the type of fire and personal ...personal injury. • The displays and illustrations (such as key markings) shown in a safe place where it . Disposing of the Calculator • Never dispose of the calculator by incineration. • Misuse ...

User Guide - Page 5

... sure to press the 5 key before using the calculator for the first time. • Even if the calculator is operating normally, replace the battery at least once every three years for the fx115MS/fx-570MS/fx-991MS, or at least once every two years for the fx-95MS/fx-100MS. A dead battery can cause slow display response, total failure of...

User Guide - Page 7

... Display Formats 10 kDecimal Point and Separator Symbols 11 k Initializing the Calculator 11 Basic Calculations 11 k Arithmetic Calculations 11 kFraction Operations 12 kPercentage Calculations 14 kDegrees, Minutes, Seconds Calculations 15 kFIX, SCI, RND 15 Memory Calculations 16 kAnswer Memory 16 kConsecutive Calculations 17 kIndependent Memory 17 k Variables 17 Scientific...

User Guide - Page 9

fx-95MS Modes To perform this type of calculation: Perform this To enter key operation: this mode: Basic arithmetic calculations F 1 COMP Standard deviation F 2 SD Regression calculations F 3 REG Solution of the mantissa has more than three digits. A separator symbol is displayed every three digits when the integer part of equations F F 1 EQN 7 Users of other models should ...

User Guide - Page 10

... each time you press a number key or arithmetic operator key A A or p key operation does not take up a step, so inputting A D, for example, takes up only one step. • You can input up to input more than twice displays additional setup screens. k Input Capacity • The memory area used to change the calculator setup. • In this manual...

User Guide - Page 11

... to the normal cursor from one calculation mode to an insert cursor t. Pressing [ again back steps sequentially (new-to-old) through past calculations. • Pressing the e or r key while a replay memory calculation is on the display changes to the editing screen. • Pressing the e or r key immediately after you finish a calculation displays the editing screen for storage of both...

User Guide - Page 12

... case of the examples in this manual show calculation re- sults using a colon ( : ). • Example: To add 2 + 3 and then multiply the result by 4 2 + 3 p \ g - 4 = 2+3 5.Disp = Ans×4 20. u Norm 1 With Norm 1, exponential notation is automatically used . • To change the exponential display format, press the F key a number of two or more than two decimal...

User Guide - Page 13

.... • To change the decimal point and separator symbol set- Disp 1 • Display the selection screen. fx-95MS: 1 r Other Models: 1 r r • Press the number key (1 or 2) that corresponds to the setting you want to use the display setup (Disp) screen to perform basic calculations. COMP F 1 • Negative values inside of times until you want to...

User Guide - Page 15

... (Disp) screen to specify the display format when a fraction calculation result is greater than one. • To change the fraction display format, press the q key a number of times until you want to the setting you reach the setup screen shown below. fx-95MS: 1 Other Models: 1 r • Press the number key (1 or 2) that corresponds to use. 1(ab...

User Guide - Page 16

...display format is selected. • An error occurs if you try to assign the Answer Memory value into a variable and then use the variable in the mark up or discount calculation...e e e e 8 = 14 How about to 46? This is because the calculation performed when v is pressed stores a result to Answer Memory before the , key is pressed. • Example 6: If 300 grams are added to a test sample...

User Guide - Page 17

... sexagesimal calculations using degrees (hours), minutes, and seconds, and convert between sexagesimal and decimal values. • Example 1: To convert the decimal value 2.258 to a sexagesimal value and then back to change the settings for the number of decimal places, the number of significant digits, or the exponential display format, press the F key a number...

User Guide - Page 18

... 3.3-01 • Press F ..... 3(Norm) 1 to clear the Fix specification. • Example 2: 1 Ö 3, displaying result with result whenever you press = after inputting values or an ex- COMP F 1 k Answer Memory • Whenever you press A v, |, A {, or A j followed by a letter (A through F, or M, X, or Y). 16 Memory Calculations COMP Use the F key to enter the COMP Mode when you want...

User Guide - Page 19

Note that pressing an operator key while a result is displayed causes the displayed value to change to a 17 • You can recall Answer Memory contents by any of your next calculation. k Independent Memory • Values can be used to store data, constants, results, and other values. • Use the following operation to delete data assigned...

User Guide - Page 20

... shown below. A B 1(Mcl) = • Example: 193.2 Ö 23 ҃ 8.4 193.2 Ö 28 ҃ 6.9 193.2 A j 1 \ 23 = p 1 \ 28 = Scientific Function Calculations COMP Use the F key to appear on the display before starting the next calculation. • π = 3.14159265359 k Trigonometric/Inverse Trigonometric Functions • To change the default angle unit (degrees, radians, grads...

User Guide - Page 23

* A n in the case of fx-100MS/fx-115MS/fx-570MS/ fx-991MS. θ ҃ 1.047197551 0 o • Press 0 n to display the value of r, or 0 o to display the value of fx-100MS/fx-115MS/fx-570MS/ fx-991MS. k Angle Unit Conversion • Press A v to polar coordinates (r,␪) (Rad) r ҃ 2 f* 1 P L 3 T = * A f in the case of ␪. 21 D R G 1 2 3 • Pressing 1, 2, or ...

User Guide - Page 24

... + bx2 + cx + d = 0 Entering the EQN Mode and pressing r displays the initial quadratic/cubic equation screen. view other elements. Deg r ee? 2 3 Use this screen to three unknowns. Use the F key to enter the EQN Mode when you should scroll to solve an equation. k Engineering Notation Calculations • Example 1: To convert 56,088 meters to...

User Guide - Page 25

...Certain coefficients can use the [ and ] keys to move between coefficients on the display. Press A r to scroll between the..., the real part of the solutions appears as soon as you input a value for the final coefficient. Calculation starts and one of the first solution appears first. Solution Press the ] key to view other 0. x + 2 = 0 (x = 2, -1, 1) (Degree?) 3 (a?) 1 = (b?) D 2 =...

User Guide - Page 28

...SD 1. Statistical SD Calculations REG Standard Deviation SD Use the F key to enter the SD Mode when you can recall using the key opera- SD F 2 (fx-95MS) F F... 1 (Other Models) • Always start data input with A B 1(Scl) = to clear statistical memory. • Input data using standard deviation. S • Input data is indicated on the display...

User Guide - Page 37

* fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS only. • Operations of the matrix stack. Example: ( -2)4 = 16 -24 = -16 k Stacks This calculator uses memory areas, called "stacks," to temporarily store values (numeric stack) and commands (command stack) according to left to right. • Operations enclosed in parentheses ...

User Guide - Page 40

... the battery 1 Press A i to turn power on the display of the calculator indicate that battery power is low can also cause them to become large. (This is powered by a single AA-size battery. Screw 38 Replacing the Battery Dim figures on . Power Supply (fx-95MS only) Users of other models should refer to...