Casio fx 991MS Support Question
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!
Question posted by sangeethamj on February 28th, 2013
Something Is Wrong With My Casio Fx-991
Everytime i click a number or anything, it won't let me. while it's on. it won't even turn off when i click SHIFT and AC. it worked perfectly fine yesterday.
Current Answers
Related Casio fx 991MS Manual Pages
User Guide - Page 1
fx-95MS fx-100MS fx-115MS (fx-912MS) fx-570MS fx-991MS
User's Guide
kfx-912MS owners
Please be sure to read the important notice of this manual.
E
http://world.casio.com/edu_e/
User Guide - Page 3
Never slide the display end of the unit into the cover.
.....1
.....2
1 Removing and Replacing the Calculator's Cover
• Before starting .....1 Holding the cover as shown in the illustration, slide the unit out of the cover. • After you are finished .....2 Holding ...
User Guide - Page 4
...Never charge batteries, try to take batteries apart, or allow batteries to use the calculator for a long time (fx-95MS/100MS/570MS). • Use only the type of small children. Never expose... negative l ends are for illustrative purposes
2 Disposing of the Calculator
• Never dispose of fire and personal injury.
• The displays and illustrations (such as key markings) shown in a safe...
User Guide - Page 5
... to very high temperatures. Moreover, CASIO Computer Co., Ltd. Handling Precautions
• Be 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...
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 8
... Numbers, π, and
Permutation/Combination 20 kAngle Unit Conversion 21
kCoordinate Conversion (Pol (x, y), Rec (r 21
kEngineering Notation Calculations 22
Equation Calculations... 22
kQuadratic and Cubic Equations 22 kSimultaneous Equations 24
Statistical Calculations 26
Standard Deviation 26 Regression Calculations 28
Technical...
User Guide - Page 9
...
Solution of the mantissa has more than three digits.
Two-line Display
The two-line display makes it possible to the "User's Guide 2 (Additional Functions)" for the fx-95MS only. Before getting started... k Modes
Before starting a calculation, you must first enter the correct mode as indicated in the table below. • The following table...
User Guide - Page 12
..., press the F
key a number of times until you reach the exponential display format setup screen shown below. u Norm 1 With Norm 1, exponential notation is automatically used for integer values with more than two decimal places.
In the case of decimal values, you can display up of the examples in this manual show calculation re- F i x Sc...
User Guide - Page 13
ting, press the F key a number of calculations must be enclosed within parentheses. 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 specify the symbols you want for the decimal point and 3-digit separator. • To change the decimal point and...
User Guide - Page 15
fx-95MS:
1
Other Models: 1 r
• Press the number key (1 or 2) that corresponds to
the setting you want to use the display setup (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 reach the setup screen shown below...
User Guide - Page 17
...; You can perform 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...
User Guide - Page 20
...Scientific Function Calculations
COMP
Use the F key to enter the COMP Mode when you reach the angle unit setup screen shown below. COMP F 1
• Certain types of calculations...display before starting the next calculation.
• π = 3.14159265359
k Trigonometric/Inverse Trigonometric Functions
• To change the default angle unit (degrees, radians, grads), press the F key a number...
User Guide - Page 22
... 123 =
• Example 4: 123 ѿ 302 ҃ 1023
123 + 30 K =
• Example 5: 123 ҃ 1728
12 N * =
* A N in a group of fx-570MS/fx-991MS.
• Example 6: 1 ҃ 12
1 3
ȕ
1 4
R 3 a , 4 a T a =
• Example 7: 8! ҃ 40320
8 A f =
• Example 8: To generate a random number between
0.000 and 0.999
A M =
0.66400
(The above value is a sample only.
User Guide - Page 23
... fx-100MS/fx-115MS/fx-570MS/ fx-991MS.
k Angle Unit Conversion • Press A v to display the following menu. D R G
1 2 3
• Pressing 1, 2, or 3 converts the displayed value to the corresponding angle unit.
• Example: To convert 4.25 radians to degrees
q ..... 1(Deg)
4.25 A v 2(R) =
4 . 25r
243.5070629
k Coordinate Conversion (Pol (x, y), Rec (r, θ ))
• Calculation...
User Guide - Page 24
EQN F F 1 (fx-95MS) F F F 1 (Other Models)
k Quadratic and Cubic Equations
Quadratic Equation: ax2 + bx + c = 0 Cubic Equation: ax3 + bx2 + cx + d = 0 Entering the EQN Mode and pressing r displays the initial quadratic/cubic equation screen. view other elements.
Element value 22 k Engineering Notation Calculations
• Example 1: To convert 56,088 meters to kilometers
→ 56.088 ...
User Guide - Page 28
... to register your input, the number of value:
Σx2 Σx n o σn σn-1
Perform this key operation:
A U 1 A U 2 A U 3 A X 1 A X 2 A X 3
• Example: To calculate σnҀ1, σn, o,...calculations using standard deviation. 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...
User Guide - Page 30
...number key (1, 2, or 3) that corresponds to the type of regression you will be able to display or edit any longer after perform either the following operations. REG F 3 (fx-95MS) F F 2 (Other Models)
• Entering the REG Mode displays... Changing the regression type (Lin, Log, Exp, Pwr, Inv, Quad)
Regression Calculations
REG
Use the F key to enter the REG Mode when you just input, ...
User Guide - Page 37
* fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS only. • Operations of the matrix stack. exIn 120 → ex{In( 120)} • Other operations are performed from left to right. • Operations enclosed in parentheses are performed first. • When a calculation contains an argument that the capacity of a stack is exceeded. • Matrix calculations use up...
User Guide - Page 40
...
1 Press A i to turn power off.
Continued use of the calculator when the battery is low can also cause them to the "User's Guide 2 (Additional Functions)." Replace the battery as soon as possible when display figures become dim. * For a single calculation, calculation error is ±1 at the 10th digit. (In the case of exponential display, calculation error is...
User Guide - Page 41
... Temperature: 0°C to 40°C (32°F to the "User's Guide 2 (Additional Functions)." Specifications (fx-95MS only)
Users of flashing cursor.
Power Supply: Single AA-size battery (R6P (SUM-3))
Battery Life:
Approximately 17,000 hours continuous display of other models should refer to turn power back on. u Auto Power Off
Calculator power automatically turns off .
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