When you ask "What number is halfway between 24 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=24 and Y=687.
To find the number halfway between 24 and 687, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 24 and 687 into our formula, we get:
(24 + 687)/2 = 355.5
Thus, the number halfway between 24 and 687 is 355.5.
To check that our answer is correct, we subtract 24 from 355.5 and subtract 355.5 from 687 and compare the two numbers:
355.5 - 24 = 331.5
687 - 355.5 = 331.5
As you can see, the halfway number is 331.5 higher than 24 and 331.5 lower than 687. Therefore, our halfway between answer of 355.5 above is correct.
Halfway Between
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Halfway Between 24 and 688
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