
When you ask "What number is halfway between 0 and 512?" 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=512.

To find the number halfway between 0 and 512, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 512 into our formula, we get:
(0 + 512)/2 = 256
Thus, the number halfway between 0 and 512 is 256.
To check that our answer is correct, we subtract 0 from 256 and subtract 256 from 512 and compare the two numbers:
256 - 0 = 256
512 - 256 = 256
As you can see, the halfway number is 256 higher than 0 and 256 lower than 512. Therefore, our halfway between answer of 256 above is correct.
Halfway Between
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Halfway Between 0 and 513
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