When you ask "What number is halfway between 45 and 156?" 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=156.
To find the number halfway between 45 and 156, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 45 and 156 into our formula, we get:
(45 + 156)/2 = 100.5
Thus, the number halfway between 45 and 156 is 100.5.
To check that our answer is correct, we subtract 45 from 100.5 and subtract 100.5 from 156 and compare the two numbers:
100.5 - 45 = 55.5
156 - 100.5 = 55.5
As you can see, the halfway number is 55.5 higher than 45 and 55.5 lower than 156. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 45 and 157
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