When you ask "What number is halfway between 77 and 275?" 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=275.
To find the number halfway between 77 and 275, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 275 into our formula, we get:
(77 + 275)/2 = 176
Thus, the number halfway between 77 and 275 is 176.
To check that our answer is correct, we subtract 77 from 176 and subtract 176 from 275 and compare the two numbers:
176 - 77 = 99
275 - 176 = 99
As you can see, the halfway number is 99 higher than 77 and 99 lower than 275. Therefore, our halfway between answer of 176 above is correct.
Halfway Between
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Halfway Between 77 and 276
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