When you ask "What number is halfway between 21 and 956?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=956.
To find the number halfway between 21 and 956, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 956 into our formula, we get:
(21 + 956)/2 = 488.5
Thus, the number halfway between 21 and 956 is 488.5.
To check that our answer is correct, we subtract 21 from 488.5 and subtract 488.5 from 956 and compare the two numbers:
488.5 - 21 = 467.5
956 - 488.5 = 467.5
As you can see, the halfway number is 467.5 higher than 21 and 467.5 lower than 956. Therefore, our halfway between answer of 488.5 above is correct.
Halfway Between
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Halfway Between 21 and 957
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