When you ask "What number is halfway between 77 and 350?" 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=350.
To find the number halfway between 77 and 350, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 350 into our formula, we get:
(77 + 350)/2 = 213.5
Thus, the number halfway between 77 and 350 is 213.5.
To check that our answer is correct, we subtract 77 from 213.5 and subtract 213.5 from 350 and compare the two numbers:
213.5 - 77 = 136.5
350 - 213.5 = 136.5
As you can see, the halfway number is 136.5 higher than 77 and 136.5 lower than 350. Therefore, our halfway between answer of 213.5 above is correct.
Halfway Between
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Halfway Between 77 and 351
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