When you ask "What number is halfway between 31 and 271?" 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=271.
To find the number halfway between 31 and 271, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 271 into our formula, we get:
(31 + 271)/2 = 151
Thus, the number halfway between 31 and 271 is 151.
To check that our answer is correct, we subtract 31 from 151 and subtract 151 from 271 and compare the two numbers:
151 - 31 = 120
271 - 151 = 120
As you can see, the halfway number is 120 higher than 31 and 120 lower than 271. Therefore, our halfway between answer of 151 above is correct.
Halfway Between
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Halfway Between 31 and 272
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