When you ask "What number is halfway between 77 and 270?" 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=270.
To find the number halfway between 77 and 270, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 270 into our formula, we get:
(77 + 270)/2 = 173.5
Thus, the number halfway between 77 and 270 is 173.5.
To check that our answer is correct, we subtract 77 from 173.5 and subtract 173.5 from 270 and compare the two numbers:
173.5 - 77 = 96.5
270 - 173.5 = 96.5
As you can see, the halfway number is 96.5 higher than 77 and 96.5 lower than 270. Therefore, our halfway between answer of 173.5 above is correct.
Halfway Between
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Halfway Between 77 and 271
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