When you ask "What number is halfway between 72 and 331?" 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=331.
To find the number halfway between 72 and 331, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 331 into our formula, we get:
(72 + 331)/2 = 201.5
Thus, the number halfway between 72 and 331 is 201.5.
To check that our answer is correct, we subtract 72 from 201.5 and subtract 201.5 from 331 and compare the two numbers:
201.5 - 72 = 129.5
331 - 201.5 = 129.5
As you can see, the halfway number is 129.5 higher than 72 and 129.5 lower than 331. Therefore, our halfway between answer of 201.5 above is correct.
Halfway Between
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Halfway Between 72 and 332
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