When you ask "What number is halfway between 0 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=0 and Y=256.
To find the number halfway between 0 and 256, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 256 into our formula, we get:
(0 + 256)/2 = 128
Thus, the number halfway between 0 and 256 is 128.
To check that our answer is correct, we subtract 0 from 128 and subtract 128 from 256 and compare the two numbers:
128 - 0 = 128
256 - 128 = 128
As you can see, the halfway number is 128 higher than 0 and 128 lower than 256. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 0 and 257
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