When you ask "What number is halfway between 88 and 711?" 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=711.
To find the number halfway between 88 and 711, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 711 into our formula, we get:
(88 + 711)/2 = 399.5
Thus, the number halfway between 88 and 711 is 399.5.
To check that our answer is correct, we subtract 88 from 399.5 and subtract 399.5 from 711 and compare the two numbers:
399.5 - 88 = 311.5
711 - 399.5 = 311.5
As you can see, the halfway number is 311.5 higher than 88 and 311.5 lower than 711. Therefore, our halfway between answer of 399.5 above is correct.
Halfway Between
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Halfway Between 88 and 712
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