When you ask "What number is halfway between 80 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=80 and Y=511.
To find the number halfway between 80 and 511, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 511 into our formula, we get:
(80 + 511)/2 = 295.5
Thus, the number halfway between 80 and 511 is 295.5.
To check that our answer is correct, we subtract 80 from 295.5 and subtract 295.5 from 511 and compare the two numbers:
295.5 - 80 = 215.5
511 - 295.5 = 215.5
As you can see, the halfway number is 215.5 higher than 80 and 215.5 lower than 511. Therefore, our halfway between answer of 295.5 above is correct.
Halfway Between
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Halfway Between 80 and 512
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