When you ask "What number is halfway between 87 and 744?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=744.
To find the number halfway between 87 and 744, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 744 into our formula, we get:
(87 + 744)/2 = 415.5
Thus, the number halfway between 87 and 744 is 415.5.
To check that our answer is correct, we subtract 87 from 415.5 and subtract 415.5 from 744 and compare the two numbers:
415.5 - 87 = 328.5
744 - 415.5 = 328.5
As you can see, the halfway number is 328.5 higher than 87 and 328.5 lower than 744. Therefore, our halfway between answer of 415.5 above is correct.
Halfway Between
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Halfway Between 87 and 745
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