When you ask "What number is halfway between 87 and 386?" 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=386.
To find the number halfway between 87 and 386, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 386 into our formula, we get:
(87 + 386)/2 = 236.5
Thus, the number halfway between 87 and 386 is 236.5.
To check that our answer is correct, we subtract 87 from 236.5 and subtract 236.5 from 386 and compare the two numbers:
236.5 - 87 = 149.5
386 - 236.5 = 149.5
As you can see, the halfway number is 149.5 higher than 87 and 149.5 lower than 386. Therefore, our halfway between answer of 236.5 above is correct.
Halfway Between
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Halfway Between 87 and 387
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