When you ask "What number is halfway between 21 and 532?" 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=532.
To find the number halfway between 21 and 532, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 532 into our formula, we get:
(21 + 532)/2 = 276.5
Thus, the number halfway between 21 and 532 is 276.5.
To check that our answer is correct, we subtract 21 from 276.5 and subtract 276.5 from 532 and compare the two numbers:
276.5 - 21 = 255.5
532 - 276.5 = 255.5
As you can see, the halfway number is 255.5 higher than 21 and 255.5 lower than 532. Therefore, our halfway between answer of 276.5 above is correct.
Halfway Between
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Halfway Between 21 and 533
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