When you ask "What number is halfway between 45 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=45 and Y=112.
To find the number halfway between 45 and 112, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 45 and 112 into our formula, we get:
(45 + 112)/2 = 78.5
Thus, the number halfway between 45 and 112 is 78.5.
To check that our answer is correct, we subtract 45 from 78.5 and subtract 78.5 from 112 and compare the two numbers:
78.5 - 45 = 33.5
112 - 78.5 = 33.5
As you can see, the halfway number is 33.5 higher than 45 and 33.5 lower than 112. Therefore, our halfway between answer of 78.5 above is correct.
Halfway Between
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Halfway Between 45 and 113
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