When you ask "What number is halfway between 63 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=63 and Y=72.
To find the number halfway between 63 and 72, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 72 into our formula, we get:
(63 + 72)/2 = 67.5
Thus, the number halfway between 63 and 72 is 67.5.
To check that our answer is correct, we subtract 63 from 67.5 and subtract 67.5 from 72 and compare the two numbers:
67.5 - 63 = 4.5
72 - 67.5 = 4.5
As you can see, the halfway number is 4.5 higher than 63 and 4.5 lower than 72. Therefore, our halfway between answer of 67.5 above is correct.
Halfway Between
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Halfway Between 63 and 73
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