When you ask "What number is halfway between 8 and 77?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=77.
To find the number halfway between 8 and 77, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 77 into our formula, we get:
(8 + 77)/2 = 42.5
Thus, the number halfway between 8 and 77 is 42.5.
To check that our answer is correct, we subtract 8 from 42.5 and subtract 42.5 from 77 and compare the two numbers:
42.5 - 8 = 34.5
77 - 42.5 = 34.5
As you can see, the halfway number is 34.5 higher than 8 and 34.5 lower than 77. Therefore, our halfway between answer of 42.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 8 and 78
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