When you ask "What number is halfway between 77 and 418?" 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=418.
To find the number halfway between 77 and 418, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 418 into our formula, we get:
(77 + 418)/2 = 247.5
Thus, the number halfway between 77 and 418 is 247.5.
To check that our answer is correct, we subtract 77 from 247.5 and subtract 247.5 from 418 and compare the two numbers:
247.5 - 77 = 170.5
418 - 247.5 = 170.5
As you can see, the halfway number is 170.5 higher than 77 and 170.5 lower than 418. Therefore, our halfway between answer of 247.5 above is correct.
Halfway Between
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Halfway Between 77 and 419
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