When you ask "What number is halfway between 87 and 682?" 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=682.
To find the number halfway between 87 and 682, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 682 into our formula, we get:
(87 + 682)/2 = 384.5
Thus, the number halfway between 87 and 682 is 384.5.
To check that our answer is correct, we subtract 87 from 384.5 and subtract 384.5 from 682 and compare the two numbers:
384.5 - 87 = 297.5
682 - 384.5 = 297.5
As you can see, the halfway number is 297.5 higher than 87 and 297.5 lower than 682. Therefore, our halfway between answer of 384.5 above is correct.
Halfway Between
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Halfway Between 87 and 683
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