
When you ask "What number is halfway between 85 and 356?" 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=356.

To find the number halfway between 85 and 356, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 356 into our formula, we get:
(85 + 356)/2 = 220.5
Thus, the number halfway between 85 and 356 is 220.5.
To check that our answer is correct, we subtract 85 from 220.5 and subtract 220.5 from 356 and compare the two numbers:
220.5 - 85 = 135.5
356 - 220.5 = 135.5
As you can see, the halfway number is 135.5 higher than 85 and 135.5 lower than 356. Therefore, our halfway between answer of 220.5 above is correct.
Halfway Between
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Halfway Between 85 and 357
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