When you ask "What number is halfway between 8 and 877?" 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=877.
To find the number halfway between 8 and 877, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 877 into our formula, we get:
(8 + 877)/2 = 442.5
Thus, the number halfway between 8 and 877 is 442.5.
To check that our answer is correct, we subtract 8 from 442.5 and subtract 442.5 from 877 and compare the two numbers:
442.5 - 8 = 434.5
877 - 442.5 = 434.5
As you can see, the halfway number is 434.5 higher than 8 and 434.5 lower than 877. Therefore, our halfway between answer of 442.5 above is correct.
Halfway Between
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Halfway Between 8 and 878
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