When you ask "What number is halfway between 63 and 494?" 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=494.
To find the number halfway between 63 and 494, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 494 into our formula, we get:
(63 + 494)/2 = 278.5
Thus, the number halfway between 63 and 494 is 278.5.
To check that our answer is correct, we subtract 63 from 278.5 and subtract 278.5 from 494 and compare the two numbers:
278.5 - 63 = 215.5
494 - 278.5 = 215.5
As you can see, the halfway number is 215.5 higher than 63 and 215.5 lower than 494. Therefore, our halfway between answer of 278.5 above is correct.
Halfway Between
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Halfway Between 63 and 495
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