When you ask "What number is halfway between 77 and 908?" 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=908.
To find the number halfway between 77 and 908, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 908 into our formula, we get:
(77 + 908)/2 = 492.5
Thus, the number halfway between 77 and 908 is 492.5.
To check that our answer is correct, we subtract 77 from 492.5 and subtract 492.5 from 908 and compare the two numbers:
492.5 - 77 = 415.5
908 - 492.5 = 415.5
As you can see, the halfway number is 415.5 higher than 77 and 415.5 lower than 908. Therefore, our halfway between answer of 492.5 above is correct.
Halfway Between
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Halfway Between 77 and 909
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