When you ask "What number is halfway between 7 and 72?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=72.
To find the number halfway between 7 and 72, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 72 into our formula, we get:
(7 + 72)/2 = 39.5
Thus, the number halfway between 7 and 72 is 39.5.
To check that our answer is correct, we subtract 7 from 39.5 and subtract 39.5 from 72 and compare the two numbers:
39.5 - 7 = 32.5
72 - 39.5 = 32.5
As you can see, the halfway number is 32.5 higher than 7 and 32.5 lower than 72. Therefore, our halfway between answer of 39.5 above is correct.
Halfway Between
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Halfway Between 7 and 73
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