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 |
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