When you ask "What number is halfway between 88 and 729?" 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=729.
To find the number halfway between 88 and 729, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 729 into our formula, we get:
(88 + 729)/2 = 408.5
Thus, the number halfway between 88 and 729 is 408.5.
To check that our answer is correct, we subtract 88 from 408.5 and subtract 408.5 from 729 and compare the two numbers:
408.5 - 88 = 320.5
729 - 408.5 = 320.5
As you can see, the halfway number is 320.5 higher than 88 and 320.5 lower than 729. Therefore, our halfway between answer of 408.5 above is correct.
Halfway Between
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Halfway Between 88 and 730
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