When you ask "What number is halfway between 31 and 68?" 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=68.
To find the number halfway between 31 and 68, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 68 into our formula, we get:
(31 + 68)/2 = 49.5
Thus, the number halfway between 31 and 68 is 49.5.
To check that our answer is correct, we subtract 31 from 49.5 and subtract 49.5 from 68 and compare the two numbers:
49.5 - 31 = 18.5
68 - 49.5 = 18.5
As you can see, the halfway number is 18.5 higher than 31 and 18.5 lower than 68. Therefore, our halfway between answer of 49.5 above is correct.
Halfway Between
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Halfway Between 31 and 69
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