When you ask "What number is halfway between 87 and 672?" 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=672.
To find the number halfway between 87 and 672, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 672 into our formula, we get:
(87 + 672)/2 = 379.5
Thus, the number halfway between 87 and 672 is 379.5.
To check that our answer is correct, we subtract 87 from 379.5 and subtract 379.5 from 672 and compare the two numbers:
379.5 - 87 = 292.5
672 - 379.5 = 292.5
As you can see, the halfway number is 292.5 higher than 87 and 292.5 lower than 672. Therefore, our halfway between answer of 379.5 above is correct.
Halfway Between
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Halfway Between 87 and 673
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