When you ask "What number is halfway between 89 and 112?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=89 and Y=112.
To find the number halfway between 89 and 112, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 89 and 112 into our formula, we get:
(89 + 112)/2 = 100.5
Thus, the number halfway between 89 and 112 is 100.5.
To check that our answer is correct, we subtract 89 from 100.5 and subtract 100.5 from 112 and compare the two numbers:
100.5 - 89 = 11.5
112 - 100.5 = 11.5
As you can see, the halfway number is 11.5 higher than 89 and 11.5 lower than 112. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 89 and 113
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