Ive never used these buttons in my life.
Me either, probably because i don't even know what they are exactly for :/ and on a basic calculator? must have some use to normal math i suppose.
M+ stores the current number shown on the calculator. MRC I believe erases those numbers in memory. I don't use the basic calcs, though since I'm far too accustomed to my scientific one.
m+ adds whatever is on the screen to memory
m- subtracts whatever is on the screen from memory
mrc is the memory recall button which displays whatever is in memory on the screen
here is an example
This makes sure that your memory is clear
press 5 and then m+ (a small m usually appears somewhere to let you know there is something other than 0 in the memory)
now press mrc, you will see 5
press 4 and then m+
now press mrc and you will see 9 (5+4=9)
press 3 and then press m-
now press mrc and you will see 6 (9-3=6)
remember no matter what else you do, as long as you use no memory functions or switch the calculator off, that 6 will remain in memory.
oh how we love technology
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