Question about Casio FX991ES Scientific Calculator

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Memory store how to store memory in this calculator

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Press SHIFT [STO] then one of the memories A, B, C, D, E, F, or M. You can then recall the value by pressing RCL and then the same letter.

Posted on Jul 15, 2013


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Posted on Jan 02, 2017


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Can't store values

You must select the memory location (M0 to M9)
To store 45 in Memory M7, type in 45, press the STOre key, then press 7.
To recall the contents of M7 press RCL 7

Apr 06, 2014 | Texas Instruments BA-II Plus Calculator

1 Answer

Casio instructions

For simple scientific calculators, you have a certain number of memory locations A, B, C, D, X,Y, M. Maybe more,
To store a value in a memory location you use the [STO] or
[SHIFT] [RCL] (STO) sequence.

15 [STO] A (displays 15)
[RCL] A (displays 15)

For graphing calculator, you have 26 memory locations, one in each letter. You use the STO key to store as above. You may also have the possibility to store programs, and on certain models a text editor.

Jan 04, 2014 | Casio Office Equipment & Supplies

1 Answer

Sebutan algebra pemboleh ubah

Google translated the heading of you question as Referenc(es)ing algebraic variables.
Some Scientific calculators have a few memory locations called a, b, c, d, M, x and y. M is the continuous memory while the others are variables where you can store values in view of some future calculations. These are usually accessed with STO> key + Letter name to store the values and RCL + letter name to recall the values to the command line. The values are fixed to 0 by default or to the last values stored in the named memory locations. However the calculators do not handle algebra, unless they have a COMPUTER ALGEBRA SYSTEM or CAS. Only some graphing calculators have that capability.

Oct 07, 2013 | Aurora Electronics SC150X Scientific...

1 Answer

How i store the values in my fx-991ms casio calculator

You can store values in the memory locations the calculator has (A,B,C, D, M). However they will may not remain stored once the calculator is turned off.
To store a value in say Memory location A
type in the number and press STO> A.
If that does not work, type in a number and press STO> ALPHA A
To retrieve a stored value, press RCL A or RCL ALPHA A

May 25, 2012 | Casio Office Equipment & Supplies

1 Answer

How to turn memory off on casio fx300es

There is no memory that YOU can turn ON or OFF. All you can do is store numbers in some memory locations (A,B,C,D,X,Y) and M. By pressing ALPHA 9 (CLR) you reset the calculator, thus clearing the contents of the memory locations. Another way to clear a memory location is to store 0 in it. 0 ->ALPHA A, stores 0 in A.

Sep 05, 2011 | Casio fx-300ES Calculator

2 Answers

What does MC, MR, & MS mean?


Welcome to Fixya. Heres the meaning that you're looking for.

MC - Memory Clear. this clears all contents of the memory
MR - Memory Recall. This displays the current content in the memory
MS - Memory Save. This saves the current display to memory.
M+ - Memory Add. This adds the current figure to the value already present in memory.

Thanks for using Fixya.

May 12, 2011 | Office Equipment & Supplies

1 Answer

How to clear the memory key on Texas instrument scientific calculator TI 30XA or use the memory key

Your calculator has 3 memories (M1, M2,M3)
To store the number 170 in M1 use 170[STO]1
To recall a number from M1 use [RCL]1
To add a number to the content of M1 [2nd][SUM]1 (adds displayed value to contents of M1).
[2nd][EXC] 2 exchanges the value already displayed with the contents of M2:

To erase (clear) a memory register, just store 0 in it.

Hope it helps.

Oct 22, 2009 | Texas Instruments TI-30XA Calculator

4 Answers

What does MC,MR,M-,M+ on the calculator mean and do?


MR is Memory Recall
MC is Memory Clear
M+ is Memory add
M- is Memory subtract

These are used to add and subtract the answers to multi-step equations so you can do the small steps with the calculator, then store, change or recall the total as needed. You might add a long string of numbers in groups this way. Or you can do all operations in one parenthesis, then just store the total of each.

A good problem to illustrate this would be : (123 x 3) + (55 - 24) + (10^2) - (7 x 8) = ???
Using MR, M+ and M-, you can do each one as a group, and only store the answers. 123 x 3 = 369 so M+ to put 369 in memory. Clear it from the calculator. 55 - 24 = 31, so M+ to put this in memory and add to the 369 already there. Clear it from the calculator. 10^2 = 100, so M+ this to memory also to add it. Clear it from the calculator. 7 x 8 = 56 so M- this to SUBTRACT it from memory. Clear it from the calculator if desired. Now, when you then hit MR, you will get the total of all of these small equations in parenthesis -- 444.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Sep 18, 2009 | Office Equipment & Supplies

1 Answer

How do I earase the M2 button that is always on my screen?

Clear the display so that zero shows, then press STO M2 to store zero in the M2 registry. Any time there is a non-zero number stored in M1, M2 or M3, you will see those memories in the display to remind you there's something stored. There is no "clear memory" function on the TI-30XA, you have to store zero in the memory to clear M1, M2 or M3 from the display.


Dec 17, 2008 | Texas Instruments TI-30XA Calculator

2 Answers


when you press the keypad the calculator scanline translate and encode this function to digital formula(1&0)which the brain can understand(microprocessor)and this digital formula stored in a store called register which can easily called out to go to display where you can see it.

Nov 03, 2007 | Casio FX-115W Plus Calculator

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