When you ask "What number is halfway between 97 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=97 and Y=687.
To find the number halfway between 97 and 687, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 687 into our formula, we get:
(97 + 687)/2 = 392
Thus, the number halfway between 97 and 687 is 392.
To check that our answer is correct, we subtract 97 from 392 and subtract 392 from 687 and compare the two numbers:
392 - 97 = 295
687 - 392 = 295
As you can see, the halfway number is 295 higher than 97 and 295 lower than 687. Therefore, our halfway between answer of 392 above is correct.
Halfway Between
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Halfway Between 97 and 688
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