When you ask "What number is halfway between 13 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=13 and Y=438.
To find the number halfway between 13 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 438 into our formula, we get:
(13 + 438)/2 = 225.5
Thus, the number halfway between 13 and 438 is 225.5.
To check that our answer is correct, we subtract 13 from 225.5 and subtract 225.5 from 438 and compare the two numbers:
225.5 - 13 = 212.5
438 - 225.5 = 212.5
As you can see, the halfway number is 212.5 higher than 13 and 212.5 lower than 438. Therefore, our halfway between answer of 225.5 above is correct.
Halfway Between
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Halfway Between 13 and 439
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