When you ask "What number is halfway between 72 and 177?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=72 and Y=177.
To find the number halfway between 72 and 177, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 177 into our formula, we get:
(72 + 177)/2 = 124.5
Thus, the number halfway between 72 and 177 is 124.5.
To check that our answer is correct, we subtract 72 from 124.5 and subtract 124.5 from 177 and compare the two numbers:
124.5 - 72 = 52.5
177 - 124.5 = 52.5
As you can see, the halfway number is 52.5 higher than 72 and 52.5 lower than 177. Therefore, our halfway between answer of 124.5 above is correct.
Halfway Between
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Halfway Between 72 and 178
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