M memory of casio fx 991es calculator |Save value | Store Value|

Using the memory and display functions in your scientific calculator can help you use your device to its full capacity. By using the memory key, you'll be able to store or save long lists of numbers that you would like the calculator to file away while you're working on other problems. This scientific calculator can hold or save up to ten memories. You'll also be able to use different buttons to display saved results. In this calculator you have to press ‘RCL’ then the location of the saved value to see it.
Inspect your calculator for keys with a capital "M" symbol. This is special memory keys in this scientific calculator. this M memory allow you to add with of deduct from the already saved value in the M. Press "M+" to add with already existing memory of your calculator. M- is used to deduct value from already existing value in the memory. By pressing ‘Shift + 9’ and the 2 you can clear the calculator memory or your saved value.