The memory on a calculator is used for temporarily retaining values. A basic calculator usually has four or five memory keys. If five, these are likely to be "MC," "MR," "MS," "M+" and "M-." Some basic calculators have only three buttons. (See References 2). The advice given below relates to “real” basic calculators as well as calculator applications, such as Windows Calculator. In the case of the latter, substitute “click” for “press.”

- Skill level:
- Moderately Easy

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## Instructions

- 1
Empty the memory by pressing a single key, either once or twice. Press the “MC” key -- or memory clear key -- once, if present. On a calculator with an "MRC" key, press the key twice to access the memory clear function. This simultaneously resets the value in memory to zero.

- 2
Save a value by first entering the value -- or doing a mathematical calculation to arrive at a value. Press keys as required to achieve this. Then press the “MS” key -- or memory save key. The value is stored in the memory. (See References 4).

- 3
Recall the value temporarily retained in the memory by pressing a single key once. Press the “MR” key -- or memory recall key -- once, if present. On a calculator with an "MRC" key, press the key once to access the memory recall function. This will display the stored value.

- 4
Increase the value stored in the memory by entering a value -- or doing a mathematical calculation to arrive at a value -- then pressing the “M+” key. The calculator will add the new value to the old value to create a new stored value. The new storied value will become visible when you press the “MR” key.

- 5
Reduce the value stored in the memory by entering a value -- or doing a mathematical calculation to arrive at a value -- then pressing the “M-” key. The calculator will subtract the new value from the old value to create a new stored value. As with the “M+” key, the new storied value will become visible when you press the “MR” key.