When you ask "What number is halfway between 72 and 153?" 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=153.
To find the number halfway between 72 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 153 into our formula, we get:
(72 + 153)/2 = 112.5
Thus, the number halfway between 72 and 153 is 112.5.
To check that our answer is correct, we subtract 72 from 112.5 and subtract 112.5 from 153 and compare the two numbers:
112.5 - 72 = 40.5
153 - 112.5 = 40.5
As you can see, the halfway number is 40.5 higher than 72 and 40.5 lower than 153. Therefore, our halfway between answer of 112.5 above is correct.
Halfway Between
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Halfway Between 72 and 154
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