
When you ask "What number is halfway between 87 and 175?" 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=175.

To find the number halfway between 87 and 175, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 175 into our formula, we get:
(87 + 175)/2 = 131
Thus, the number halfway between 87 and 175 is 131.
To check that our answer is correct, we subtract 87 from 131 and subtract 131 from 175 and compare the two numbers:
131 - 87 = 44
175 - 131 = 44
As you can see, the halfway number is 44 higher than 87 and 44 lower than 175. Therefore, our halfway between answer of 131 above is correct.
Halfway Between
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Halfway Between 87 and 176
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