How do you use the MC, MR, MS, and M+ button on a calculator?
These buttons work with the calculator's memory, which stores one number: MC = Memory Clear sets the memory to 0 MR = Memory Recall uses the number in memory, acts as if you had keyed in that number yourself MS = Memory Store puts the number on the display into the memory M+ = Memory Add takes the number on the display, adds it to the memory, and puts the result into memory The buttons can be handy for doing repeated calculations with a single number. For instance, if you wanted to multiply a bunch of numbers by pi, you could key in the following: 3.14159.. MS (stores the number) 4 x MR = (gives you 4 times pi) 25 x 25 x MR = (gives you 25x25 times pi) The M+ button can be handy for figuring out complicated expressions if you don't happen to have a scientific calculator. For example, to calculate (5 x 6) + (12 x 2) + (3 x 7), you can do the following: 5 x 6 = (calculator says 30) MS (stores 30 in memory) 12 x 2 = (c...