When you ask "What number is halfway between 6 and 31?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=6 and Y=31.
To find the number halfway between 6 and 31, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 6 and 31 into our formula, we get:
(6 + 31)/2 = 18.5
Thus, the number halfway between 6 and 31 is 18.5.
To check that our answer is correct, we subtract 6 from 18.5 and subtract 18.5 from 31 and compare the two numbers:
18.5 - 6 = 12.5
31 - 18.5 = 12.5
As you can see, the halfway number is 12.5 higher than 6 and 12.5 lower than 31. Therefore, our halfway between answer of 18.5 above is correct.
Halfway Between
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