When you ask "What number is halfway between 87 and 508?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=508.
To find the number halfway between 87 and 508, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 508 into our formula, we get:
(87 + 508)/2 = 297.5
Thus, the number halfway between 87 and 508 is 297.5.
To check that our answer is correct, we subtract 87 from 297.5 and subtract 297.5 from 508 and compare the two numbers:
297.5 - 87 = 210.5
508 - 297.5 = 210.5
As you can see, the halfway number is 210.5 higher than 87 and 210.5 lower than 508. Therefore, our halfway between answer of 297.5 above is correct.
Halfway Between
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Halfway Between 87 and 509
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