When you ask "What number is halfway between 63 and 278?" 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=278.
To find the number halfway between 63 and 278, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 278 into our formula, we get:
(63 + 278)/2 = 170.5
Thus, the number halfway between 63 and 278 is 170.5.
To check that our answer is correct, we subtract 63 from 170.5 and subtract 170.5 from 278 and compare the two numbers:
170.5 - 63 = 107.5
278 - 170.5 = 107.5
As you can see, the halfway number is 107.5 higher than 63 and 107.5 lower than 278. Therefore, our halfway between answer of 170.5 above is correct.
Halfway Between
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Halfway Between 63 and 279
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