When you ask "What number is halfway between 31 and 180?" 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=180.
To find the number halfway between 31 and 180, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 180 into our formula, we get:
(31 + 180)/2 = 105.5
Thus, the number halfway between 31 and 180 is 105.5.
To check that our answer is correct, we subtract 31 from 105.5 and subtract 105.5 from 180 and compare the two numbers:
105.5 - 31 = 74.5
180 - 105.5 = 74.5
As you can see, the halfway number is 74.5 higher than 31 and 74.5 lower than 180. Therefore, our halfway between answer of 105.5 above is correct.
Halfway Between
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Halfway Between 31 and 181
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