When you ask "What number is halfway between 77 and 718?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=718.
To find the number halfway between 77 and 718, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 718 into our formula, we get:
(77 + 718)/2 = 397.5
Thus, the number halfway between 77 and 718 is 397.5.
To check that our answer is correct, we subtract 77 from 397.5 and subtract 397.5 from 718 and compare the two numbers:
397.5 - 77 = 320.5
718 - 397.5 = 320.5
As you can see, the halfway number is 320.5 higher than 77 and 320.5 lower than 718. Therefore, our halfway between answer of 397.5 above is correct.
Halfway Between
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Halfway Between 77 and 719
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