When you ask "What number is halfway between 31 and 306?" 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=306.
To find the number halfway between 31 and 306, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 306 into our formula, we get:
(31 + 306)/2 = 168.5
Thus, the number halfway between 31 and 306 is 168.5.
To check that our answer is correct, we subtract 31 from 168.5 and subtract 168.5 from 306 and compare the two numbers:
168.5 - 31 = 137.5
306 - 168.5 = 137.5
As you can see, the halfway number is 137.5 higher than 31 and 137.5 lower than 306. Therefore, our halfway between answer of 168.5 above is correct.
Halfway Between
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Halfway Between 31 and 307
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