When you ask "What number is halfway between 31 and 82?" 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=82.
To find the number halfway between 31 and 82, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 82 into our formula, we get:
(31 + 82)/2 = 56.5
Thus, the number halfway between 31 and 82 is 56.5.
To check that our answer is correct, we subtract 31 from 56.5 and subtract 56.5 from 82 and compare the two numbers:
56.5 - 31 = 25.5
82 - 56.5 = 25.5
As you can see, the halfway number is 25.5 higher than 31 and 25.5 lower than 82. Therefore, our halfway between answer of 56.5 above is correct.
Halfway Between
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Halfway Between 31 and 83
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