When you ask "What number is halfway between 28 and 511?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=511.
To find the number halfway between 28 and 511, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 511 into our formula, we get:
(28 + 511)/2 = 269.5
Thus, the number halfway between 28 and 511 is 269.5.
To check that our answer is correct, we subtract 28 from 269.5 and subtract 269.5 from 511 and compare the two numbers:
269.5 - 28 = 241.5
511 - 269.5 = 241.5
As you can see, the halfway number is 241.5 higher than 28 and 241.5 lower than 511. Therefore, our halfway between answer of 269.5 above is correct.
Halfway Between
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Halfway Between 28 and 512
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