When you ask "What number is halfway between 23 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=23 and Y=256.
To find the number halfway between 23 and 256, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 256 into our formula, we get:
(23 + 256)/2 = 139.5
Thus, the number halfway between 23 and 256 is 139.5.
To check that our answer is correct, we subtract 23 from 139.5 and subtract 139.5 from 256 and compare the two numbers:
139.5 - 23 = 116.5
256 - 139.5 = 116.5
As you can see, the halfway number is 116.5 higher than 23 and 116.5 lower than 256. Therefore, our halfway between answer of 139.5 above is correct.
Halfway Between
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Halfway Between 23 and 257
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