When you ask "What number is halfway between 77 and 288?" 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=288.
To find the number halfway between 77 and 288, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 288 into our formula, we get:
(77 + 288)/2 = 182.5
Thus, the number halfway between 77 and 288 is 182.5.
To check that our answer is correct, we subtract 77 from 182.5 and subtract 182.5 from 288 and compare the two numbers:
182.5 - 77 = 105.5
288 - 182.5 = 105.5
As you can see, the halfway number is 105.5 higher than 77 and 105.5 lower than 288. Therefore, our halfway between answer of 182.5 above is correct.
Halfway Between
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Halfway Between 77 and 289
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