How do the mrc m- and m+ buttons work on a very basic calculator?

[JimmyJockstrap]

Ive never used these buttons in my life.

 

[Grogerian]

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.

 

[Defennder]

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.

 

[redargon]

huh?

Ok,
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
press mrc
press m-
This makes sure that your memory is clear
Now,
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