When you ask "What number is halfway between 72 and 143?" 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=143.
To find the number halfway between 72 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 143 into our formula, we get:
(72 + 143)/2 = 107.5
Thus, the number halfway between 72 and 143 is 107.5.
To check that our answer is correct, we subtract 72 from 107.5 and subtract 107.5 from 143 and compare the two numbers:
107.5 - 72 = 35.5
143 - 107.5 = 35.5
As you can see, the halfway number is 35.5 higher than 72 and 35.5 lower than 143. Therefore, our halfway between answer of 107.5 above is correct.
Halfway Between
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Halfway Between 72 and 144
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