When you ask "What number is halfway between 31 and 276?" 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=276.
To find the number halfway between 31 and 276, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 276 into our formula, we get:
(31 + 276)/2 = 153.5
Thus, the number halfway between 31 and 276 is 153.5.
To check that our answer is correct, we subtract 31 from 153.5 and subtract 153.5 from 276 and compare the two numbers:
153.5 - 31 = 122.5
276 - 153.5 = 122.5
As you can see, the halfway number is 122.5 higher than 31 and 122.5 lower than 276. Therefore, our halfway between answer of 153.5 above is correct.
Halfway Between
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Halfway Between 31 and 277
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