When you ask "What number is halfway between 78 and 875?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=875.
To find the number halfway between 78 and 875, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 875 into our formula, we get:
(78 + 875)/2 = 476.5
Thus, the number halfway between 78 and 875 is 476.5.
To check that our answer is correct, we subtract 78 from 476.5 and subtract 476.5 from 875 and compare the two numbers:
476.5 - 78 = 398.5
875 - 476.5 = 398.5
As you can see, the halfway number is 398.5 higher than 78 and 398.5 lower than 875. Therefore, our halfway between answer of 476.5 above is correct.
Halfway Between
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Halfway Between 78 and 876
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