When you ask "What number is halfway between 31 and 126?" 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=126.
To find the number halfway between 31 and 126, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 126 into our formula, we get:
(31 + 126)/2 = 78.5
Thus, the number halfway between 31 and 126 is 78.5.
To check that our answer is correct, we subtract 31 from 78.5 and subtract 78.5 from 126 and compare the two numbers:
78.5 - 31 = 47.5
126 - 78.5 = 47.5
As you can see, the halfway number is 47.5 higher than 31 and 47.5 lower than 126. Therefore, our halfway between answer of 78.5 above is correct.
Halfway Between
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Halfway Between 31 and 127
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