When you ask "What number is halfway between 85 and 388?" 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=388.
To find the number halfway between 85 and 388, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 388 into our formula, we get:
(85 + 388)/2 = 236.5
Thus, the number halfway between 85 and 388 is 236.5.
To check that our answer is correct, we subtract 85 from 236.5 and subtract 236.5 from 388 and compare the two numbers:
236.5 - 85 = 151.5
388 - 236.5 = 151.5
As you can see, the halfway number is 151.5 higher than 85 and 151.5 lower than 388. Therefore, our halfway between answer of 236.5 above is correct.
Halfway Between
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Halfway Between 85 and 389
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