When you ask "What number is halfway between 39 and 256?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=39 and Y=256.
To find the number halfway between 39 and 256, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 256 into our formula, we get:
(39 + 256)/2 = 147.5
Thus, the number halfway between 39 and 256 is 147.5.
To check that our answer is correct, we subtract 39 from 147.5 and subtract 147.5 from 256 and compare the two numbers:
147.5 - 39 = 108.5
256 - 147.5 = 108.5
As you can see, the halfway number is 108.5 higher than 39 and 108.5 lower than 256. Therefore, our halfway between answer of 147.5 above is correct.
Halfway Between
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Halfway Between 39 and 257
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