When you ask "What number is halfway between 77 and 272?" 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=272.
To find the number halfway between 77 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 272 into our formula, we get:
(77 + 272)/2 = 174.5
Thus, the number halfway between 77 and 272 is 174.5.
To check that our answer is correct, we subtract 77 from 174.5 and subtract 174.5 from 272 and compare the two numbers:
174.5 - 77 = 97.5
272 - 174.5 = 97.5
As you can see, the halfway number is 97.5 higher than 77 and 97.5 lower than 272. Therefore, our halfway between answer of 174.5 above is correct.
Halfway Between
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Halfway Between 77 and 273
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