Halfway Between 85 and 90

When you ask "What number is halfway between 85 and 90?" 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=90.

Halfway Between Line

To find the number halfway between 85 and 90, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 85 and 90 into our formula, we get:

(85 + 90)/2 = 87.5

Thus, the number halfway between 85 and 90 is 87.5.

To check that our answer is correct, we subtract 85 from 87.5 and subtract 87.5 from 90 and compare the two numbers:

87.5 - 85 = 2.5
90 - 87.5 = 2.5

As you can see, the halfway number is 2.5 higher than 85 and 2.5 lower than 90. Therefore, our halfway between answer of 87.5 above is correct.

Halfway Between
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Halfway Between 85 and 91
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