When you ask "What number is halfway between 76 and 687?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=76 and Y=687.
To find the number halfway between 76 and 687, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 76 and 687 into our formula, we get:
(76 + 687)/2 = 381.5
Thus, the number halfway between 76 and 687 is 381.5.
To check that our answer is correct, we subtract 76 from 381.5 and subtract 381.5 from 687 and compare the two numbers:
381.5 - 76 = 305.5
687 - 381.5 = 305.5
As you can see, the halfway number is 305.5 higher than 76 and 305.5 lower than 687. Therefore, our halfway between answer of 381.5 above is correct.
Halfway Between
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Halfway Between 76 and 688
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