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Buttons on Standard Calculator

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On most of the calculators, you will find the following 7 buttons: MC, MR, MS, M+, M-, CE, C. What is the function of each button?

Let’s go over from the M* buttons:

  • MC: Memory Clear. Clears the number stored in the memory
  • MR: Memory Recall. Calls the number stored in the memory
  • MS: Memory Save. Save the number currently displayed in the memory
  • M+: Memory Plus. Increase the number saved in the memory by the number currently in display
  • M-: Memory Minus. Decrease the number saved in the memory by the number currently in display

How do we use this and when is this useful?
Let’s say you want to do the following equation on a standard calculator: (2*2) + (3*7) – (5*4)

  1. Calculate 2*2. Then press MS. Then you will see M on the display. This means a number is stored in the memory, which in our case would be 4.

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  2. Calculate 3*7. After you get 21 on the display, press M+. This will add 21 to our previous number stored in the memory, which is 4. The number stored in the memory will be 25 now. You can check by pressing MR. It will show you 25 on the display.

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  1. Calculate 5*4. After you get 20 on the display, press M-. This will subtract 20 from our previous number stored in the memory, which is 25. The number stored in the memory will be 5 now. You can check by pressing MR. It will show you 5 on the display, and now we have the answer to our equation.

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  1. Clear the memory by pressing MC. The M on you display will disappear.

Now what are C and CE buttons?

  • C: Clear. This will clear everything you input into the calculator
  • CE: Clear Entry. This will clear the last entry you input into the calculator.

imageIn this case, pressing CE will clear 5 only. Pressing C will clear everything including “3+3+3+” and “5”.

Some calculators have C/CE in one button. In this case, pressing the button once will function as CE, and pressing the button twice will function as C.

Standard calculator on Windows is used to explain the buttons, but these buttons work the same in all physical standard calculators. Some calculators have GT button, which stands for Grand Total. This will store the number that you get after pressing “=” button.