When you ask "What number is halfway between 63 and 878?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=63 and Y=878.
To find the number halfway between 63 and 878, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 878 into our formula, we get:
(63 + 878)/2 = 470.5
Thus, the number halfway between 63 and 878 is 470.5.
To check that our answer is correct, we subtract 63 from 470.5 and subtract 470.5 from 878 and compare the two numbers:
470.5 - 63 = 407.5
878 - 470.5 = 407.5
As you can see, the halfway number is 407.5 higher than 63 and 407.5 lower than 878. Therefore, our halfway between answer of 470.5 above is correct.
Halfway Between
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Halfway Between 63 and 879
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