When you ask "What number is halfway between 57 and 255?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=57 and Y=255.
To find the number halfway between 57 and 255, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 255 into our formula, we get:
(57 + 255)/2 = 156
Thus, the number halfway between 57 and 255 is 156.
To check that our answer is correct, we subtract 57 from 156 and subtract 156 from 255 and compare the two numbers:
156 - 57 = 99
255 - 156 = 99
As you can see, the halfway number is 99 higher than 57 and 99 lower than 255. Therefore, our halfway between answer of 156 above is correct.
Halfway Between
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Halfway Between 57 and 256
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