When you ask "What number is halfway between 85 and 718?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=85 and Y=718.
To find the number halfway between 85 and 718, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 718 into our formula, we get:
(85 + 718)/2 = 401.5
Thus, the number halfway between 85 and 718 is 401.5.
To check that our answer is correct, we subtract 85 from 401.5 and subtract 401.5 from 718 and compare the two numbers:
401.5 - 85 = 316.5
718 - 401.5 = 316.5
As you can see, the halfway number is 316.5 higher than 85 and 316.5 lower than 718. Therefore, our halfway between answer of 401.5 above is correct.
Halfway Between
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Halfway Between 85 and 719
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