When you ask "What number is halfway between 15 and 722?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=722.
To find the number halfway between 15 and 722, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 722 into our formula, we get:
(15 + 722)/2 = 368.5
Thus, the number halfway between 15 and 722 is 368.5.
To check that our answer is correct, we subtract 15 from 368.5 and subtract 368.5 from 722 and compare the two numbers:
368.5 - 15 = 353.5
722 - 368.5 = 353.5
As you can see, the halfway number is 353.5 higher than 15 and 353.5 lower than 722. Therefore, our halfway between answer of 368.5 above is correct.
Halfway Between
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Halfway Between 15 and 723
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