When you ask "What number is halfway between 88 and 663?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=663.
To find the number halfway between 88 and 663, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 663 into our formula, we get:
(88 + 663)/2 = 375.5
Thus, the number halfway between 88 and 663 is 375.5.
To check that our answer is correct, we subtract 88 from 375.5 and subtract 375.5 from 663 and compare the two numbers:
375.5 - 88 = 287.5
663 - 375.5 = 287.5
As you can see, the halfway number is 287.5 higher than 88 and 287.5 lower than 663. Therefore, our halfway between answer of 375.5 above is correct.
Halfway Between
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Halfway Between 88 and 664
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