Halfway Between 20 and 89

When you ask "What number is halfway between 20 and 89?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=89.

Halfway Between Line

To find the number halfway between 20 and 89, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 89 into our formula, we get:

(20 + 89)/2 = 54.5

Thus, the number halfway between 20 and 89 is 54.5.

To check that our answer is correct, we subtract 20 from 54.5 and subtract 54.5 from 89 and compare the two numbers:

54.5 - 20 = 34.5
89 - 54.5 = 34.5

As you can see, the halfway number is 34.5 higher than 20 and 34.5 lower than 89. Therefore, our halfway between answer of 54.5 above is correct.

Halfway Between
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Halfway Between 20 and 90
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