When you ask "What number is halfway between 31 and 584?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=31 and Y=584.
To find the number halfway between 31 and 584, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 584 into our formula, we get:
(31 + 584)/2 = 307.5
Thus, the number halfway between 31 and 584 is 307.5.
To check that our answer is correct, we subtract 31 from 307.5 and subtract 307.5 from 584 and compare the two numbers:
307.5 - 31 = 276.5
584 - 307.5 = 276.5
As you can see, the halfway number is 276.5 higher than 31 and 276.5 lower than 584. Therefore, our halfway between answer of 307.5 above is correct.
Halfway Between
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Halfway Between 31 and 585
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