When you ask "What number is halfway between 72 and 131?" 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=131.
To find the number halfway between 72 and 131, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 131 into our formula, we get:
(72 + 131)/2 = 101.5
Thus, the number halfway between 72 and 131 is 101.5.
To check that our answer is correct, we subtract 72 from 101.5 and subtract 101.5 from 131 and compare the two numbers:
101.5 - 72 = 29.5
131 - 101.5 = 29.5
As you can see, the halfway number is 29.5 higher than 72 and 29.5 lower than 131. Therefore, our halfway between answer of 101.5 above is correct.
Halfway Between
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Halfway Between 72 and 132
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