When you ask "What number is halfway between 84 and 723?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=723.
To find the number halfway between 84 and 723, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 723 into our formula, we get:
(84 + 723)/2 = 403.5
Thus, the number halfway between 84 and 723 is 403.5.
To check that our answer is correct, we subtract 84 from 403.5 and subtract 403.5 from 723 and compare the two numbers:
403.5 - 84 = 319.5
723 - 403.5 = 319.5
As you can see, the halfway number is 319.5 higher than 84 and 319.5 lower than 723. Therefore, our halfway between answer of 403.5 above is correct.
Halfway Between
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Halfway Between 84 and 724
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