When you ask "What number is halfway between 31 and 438?" 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=438.
To find the number halfway between 31 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 438 into our formula, we get:
(31 + 438)/2 = 234.5
Thus, the number halfway between 31 and 438 is 234.5.
To check that our answer is correct, we subtract 31 from 234.5 and subtract 234.5 from 438 and compare the two numbers:
234.5 - 31 = 203.5
438 - 234.5 = 203.5
As you can see, the halfway number is 203.5 higher than 31 and 203.5 lower than 438. Therefore, our halfway between answer of 234.5 above is correct.
Halfway Between
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Halfway Between 31 and 439
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