When you ask "What number is halfway between 31 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=31 and Y=724.
To find the number halfway between 31 and 724, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 724 into our formula, we get:
(31 + 724)/2 = 377.5
Thus, the number halfway between 31 and 724 is 377.5.
To check that our answer is correct, we subtract 31 from 377.5 and subtract 377.5 from 724 and compare the two numbers:
377.5 - 31 = 346.5
724 - 377.5 = 346.5
As you can see, the halfway number is 346.5 higher than 31 and 346.5 lower than 724. Therefore, our halfway between answer of 377.5 above is correct.
Halfway Between
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