When you ask "What number is halfway between 87 and 708?" 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=708.
To find the number halfway between 87 and 708, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 708 into our formula, we get:
(87 + 708)/2 = 397.5
Thus, the number halfway between 87 and 708 is 397.5.
To check that our answer is correct, we subtract 87 from 397.5 and subtract 397.5 from 708 and compare the two numbers:
397.5 - 87 = 310.5
708 - 397.5 = 310.5
As you can see, the halfway number is 310.5 higher than 87 and 310.5 lower than 708. Therefore, our halfway between answer of 397.5 above is correct.
Halfway Between
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Halfway Between 87 and 709
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