When you ask "What number is halfway between 39 and 742?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=39 and Y=742.
To find the number halfway between 39 and 742, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 742 into our formula, we get:
(39 + 742)/2 = 390.5
Thus, the number halfway between 39 and 742 is 390.5.
To check that our answer is correct, we subtract 39 from 390.5 and subtract 390.5 from 742 and compare the two numbers:
390.5 - 39 = 351.5
742 - 390.5 = 351.5
As you can see, the halfway number is 351.5 higher than 39 and 351.5 lower than 742. Therefore, our halfway between answer of 390.5 above is correct.
Halfway Between
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