When you ask "What number is halfway between 72 and 147?" 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=147.
To find the number halfway between 72 and 147, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 147 into our formula, we get:
(72 + 147)/2 = 109.5
Thus, the number halfway between 72 and 147 is 109.5.
To check that our answer is correct, we subtract 72 from 109.5 and subtract 109.5 from 147 and compare the two numbers:
109.5 - 72 = 37.5
147 - 109.5 = 37.5
As you can see, the halfway number is 37.5 higher than 72 and 37.5 lower than 147. Therefore, our halfway between answer of 109.5 above is correct.
Halfway Between
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Halfway Between 72 and 148
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