When you ask "What number is halfway between 77 and 764?" 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=764.
To find the number halfway between 77 and 764, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 764 into our formula, we get:
(77 + 764)/2 = 420.5
Thus, the number halfway between 77 and 764 is 420.5.
To check that our answer is correct, we subtract 77 from 420.5 and subtract 420.5 from 764 and compare the two numbers:
420.5 - 77 = 343.5
764 - 420.5 = 343.5
As you can see, the halfway number is 343.5 higher than 77 and 343.5 lower than 764. Therefore, our halfway between answer of 420.5 above is correct.
Halfway Between
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Halfway Between 77 and 765
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