When you ask "What number is halfway between 72 and 781?" 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=781.
To find the number halfway between 72 and 781, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 781 into our formula, we get:
(72 + 781)/2 = 426.5
Thus, the number halfway between 72 and 781 is 426.5.
To check that our answer is correct, we subtract 72 from 426.5 and subtract 426.5 from 781 and compare the two numbers:
426.5 - 72 = 354.5
781 - 426.5 = 354.5
As you can see, the halfway number is 354.5 higher than 72 and 354.5 lower than 781. Therefore, our halfway between answer of 426.5 above is correct.
Halfway Between
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Halfway Between 72 and 782
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