When you ask "What number is halfway between 9 and 724?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=724.
To find the number halfway between 9 and 724, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 724 into our formula, we get:
(9 + 724)/2 = 366.5
Thus, the number halfway between 9 and 724 is 366.5.
To check that our answer is correct, we subtract 9 from 366.5 and subtract 366.5 from 724 and compare the two numbers:
366.5 - 9 = 357.5
724 - 366.5 = 357.5
As you can see, the halfway number is 357.5 higher than 9 and 357.5 lower than 724. Therefore, our halfway between answer of 366.5 above is correct.
Halfway Between
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Halfway Between 9 and 725
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