When you ask "What number is halfway between 31 and 38?" 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=38.
To find the number halfway between 31 and 38, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 38 into our formula, we get:
(31 + 38)/2 = 34.5
Thus, the number halfway between 31 and 38 is 34.5.
To check that our answer is correct, we subtract 31 from 34.5 and subtract 34.5 from 38 and compare the two numbers:
34.5 - 31 = 3.5
38 - 34.5 = 3.5
As you can see, the halfway number is 3.5 higher than 31 and 3.5 lower than 38. Therefore, our halfway between answer of 34.5 above is correct.
Halfway Between
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