• Modern calculators (not talking about the advanced scientific models), have four memory keys [M+], [M-], [MC] and [MR], which perform the following set of functions: [M+]Add the display value to the memory. [M-]Subtract the displayed value from the memory. [MC]Clear the contents of the memory. [MR]Replace the displayed value with the memory value.
  • Why would you ad it to memory. I'm trying to help a 96 yo understand what these buttons (M+ and M-) do.

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