When you ask "What number is halfway between 87 and 316?" 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=316.
To find the number halfway between 87 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 316 into our formula, we get:
(87 + 316)/2 = 201.5
Thus, the number halfway between 87 and 316 is 201.5.
To check that our answer is correct, we subtract 87 from 201.5 and subtract 201.5 from 316 and compare the two numbers:
201.5 - 87 = 114.5
316 - 201.5 = 114.5
As you can see, the halfway number is 114.5 higher than 87 and 114.5 lower than 316. Therefore, our halfway between answer of 201.5 above is correct.
Halfway Between
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Halfway Between 87 and 317
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