Casio FX-991ES Support Question
Casio FX-991ES Support Question
Find answers below for this question about Casio FX-991ES.Need a Casio FX-991ES manual? We have 2 online manuals for this item!
Question posted by Anonymous-166045 on March 2nd, 2020
When I Press 1 And 4 It Does Not Appear In The Calculator
When I press 1 and 4 it does not appear in the calculator
Current Answers
Answer #1: Posted by Odin on March 2nd, 2020 11:02 AM
Odin
Member since:
April 10th, 2010 Points: 41,236,700
Member since:
April 10th, 2010 Points: 41,236,700
Go though the suggestions under Before Assuming Malfunction of the Calculator at https://www.manualslib.com/manual/25891/Casio-Fx-570es-Plus.html?page=42#manual.
If you require further advice , you'll have to consult Casio. (You can if necessary find contact information at https://www.contacthelp.com.)
Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.
Related Casio FX-991ES Manual Pages
User Guide - Page 6
... your trousers or other tight-fitting clothing where it might be subjected to twisting or bending.
• Never try to take the calculator apart. • Never press the keys of the calculator with a ballpoint pen or
other volatile agents to very high temperatures.
Always keep written records of all excess liquid before using...
User Guide - Page 7
... adjust contrast using the calculator, slide its hard case downwards to remove it probably means that battery power is on the calculator. • Press 1A(OFF) to turn on the display. Replace the battery.
Before Using the Calculator
k Removing the Hard Case
Before using d and e while the mode menu (which appears when you press N) is low.
User Guide - Page 8
.../below the current screen. This indicator appears after you press 1t(STO). The calculator is in the STAT Mode. The calculator is in the VECTOR Mode. The default...is standing by for input of a variable name to the variable. This indicator appears after you press t. Example:
Input expression
{ Calculation result
k Display Indicators
Sample Display:
CMPLX
This indicator:
S
A
M
STO
...
User Guide - Page 9
... to select. • To select the CMPLX Mode, for example, press 2. Select this type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution Matrix calculations Generation of calculation that corresponds to the mode you can jump between using...
User Guide - Page 13
...to the left side of the screen. At this time, the ] indicator appears to the left and view the hidden part by pressing the d key. Input expression: 1111 + 2222 + 3333 + 444
Math
... two key operations to 14 characters at the end of a calculation, immediately before the = key is pressed.
This will cause the ' indicator to appear to use the e key to 99 bytes of data for ...
User Guide - Page 14
...the I ) when the insert mode is
selected. You can switch to the overwrite mode by pressing 1Y(INS). • With Math format, you can change the input/output format from Linear...The initial default for more information. • The calculator automatically changes to the insert mode whenever you know. • Normally the input cursor appears as a straight vertical (I) or
horizontal ( ) ...
User Guide - Page 16
... Error
If an error message (like "Math ERROR" or "Syntax ERROR") appears when you nest too many functions and/or parentheses. LINE
14/0*2=
Press e or d.
Further input will become impossible if you press =, press d or e.
If this happens, divide the calculation into multiple parts and calculate each part separately. k Displaying the Location of 14 ÷ 10...
User Guide - Page 19
... results should be displayed in a form that includes expressions like '2 and π (irrational number form). • Pressing = after inputting a calculation displays the result using
irrational number form. • Pressing 1= after inputting a calculation displays the result
using decimal values (no irrational number form) regardless of whether you can also incorporate values into the...
User Guide - Page 28
...
perform using independent memory. The "M" appears on the display when independent memory contains a value. Independent Memory Overview • The following is any value other than zero stored in the upper left of the different operations you press the A key, change the calculation mode, or turn off the calculator.
Inputting Answer Memory Contents into an...
User Guide - Page 31
... press ...Using SOLVE
• You can use the following shows the syntax for each one variable,
an input prompt appears for the log function. Example: Y = X + 5, Y (Solves for the solution variable. E-29...(When the variable specification ",X" is omitted,
the equation Y = X × log2Y is solved for X. Appendix
Calculate an +1 = an + 2n (a1 = 1) as XY + C = 0.)
• SOLVE cannot be used...
User Guide - Page 46
... the statistical calculation type selection screen. k Statistical Calculation Types
Key Menu Item 1 1-VAR 2 A+BX 3 _+CX2 4 In X 5 e^X 6 A•B^X 7 A•X^B 8 1/X
Statistical Calculation Single-variable ... Screen The STAT editor screen appears after you enter the STAT Mode from another mode. To display the STAT editor screen from another STAT Mode screen, press 11(STAT)2(Data). E-44
...
User Guide - Page 47
... input in the COMP Mode with Linear format. • Pressing A while inputting data clears your current input. • After inputting a value, press =.
STAT
Cursor • The values and expressions you can...cursor is located.
This registers the value and displays up to six of statistical calculation you input appears in the formula area. Example: To input the value 123.45 in cell ...
User Guide - Page 57
... Mode (N5). k Equation Types
An equation type menu appears when you want to input this section are displayed with Three Unknowns
Quadratic Equation
Cubic Equation
Changing the Current Equation Type Setting Press N5(EQN) to press Ab first.
Appendix
Examples through show examples of calculations with negative binary values and examples of a two's complement...
User Guide - Page 59
... displays a screen for a quadratic or cubic equation, you cannot transform values to specify the name of the calculator's setup screen.
• Note that the matrix selection screen also appears whenever you enter the MATRIX Mode.
(2) Press a number key (1, 2, or 3) to engineering notation while an equation solution is displayed. The actual number of solutions...
User Guide - Page 60
... Answer Memory screen. • If you want to use. • Pressing a number key to specify the matrix dimension causes the matrix editor screen to appear.
Matrix Answer Memory Screen The Matrix Answer Memory (MatAns) screen shows the results of matrix calculations. k Performing Matrix Calculations
Pressing A while the matrix selection screen or matrix editor screen is...
User Guide - Page 61
...
Two Matrices) 3 × MatA (Matrix Scalar Multiplication) Obtain the determinant of Matrix A (MatA-1).
• Use the E key to input "-1". Obtain the transposition of Calculations". Note that appears when you press 14(MATRIX).
For more information, see "Using Answer Memory to Perform a Series of Matrix C (Trn(MatC)).
• You cannot edit the contents of...
User Guide - Page 64
...appears whenever you enter the VECTOR Mode.
(2) Press a number key (1, 2, or 3) to specify the name of the vector you want to select. • This displays a screen for configuring dimension settings.
(3) Press... a long time.
All calculations in this section are stored in a special Vector Answer Memory named "VctAns".
Table contents cannot be edited. • Pressing the A key returns to...
User Guide - Page 65
.... • Input is basically the same as those that appears when you press 15(VECTOR). See "Copying the Contents of the last vector calculation.
Vector Answer Memory Screen The Vector Answer Memory screen shows the result of One Matrix to the vector calculation screen, press A.
Copying the Contents of One Vector to Another Vector You...
User Guide - Page 66
...want to recall. You can use the vectors input in any calculation mode except for BASE-N. • To recall a scientific constant, press 17(CONST). This displays
the scientific constant menu. Input the ...two-digit number that corresponds to the constant you recall a constant, its unique symbol appears on ...
User Guide - Page 71
... or variable value is a problem with the format of the calculation you attempt an illegal input, or whenever any error message appears. • Pressing d or e displays to be retained in this case, the original calculation will display an error message when a result exceeds the calculation range, when you are performing.
• Action • Make necessary...
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