When you ask "What number is halfway between 87 and 116?" 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=116.
To find the number halfway between 87 and 116, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 116 into our formula, we get:
(87 + 116)/2 = 101.5
Thus, the number halfway between 87 and 116 is 101.5.
To check that our answer is correct, we subtract 87 from 101.5 and subtract 101.5 from 116 and compare the two numbers:
101.5 - 87 = 14.5
116 - 101.5 = 14.5
As you can see, the halfway number is 14.5 higher than 87 and 14.5 lower than 116. Therefore, our halfway between answer of 101.5 above is correct.
Halfway Between
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Halfway Between 87 and 117
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