When you ask "What number is halfway between 71 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=71 and Y=438.
To find the number halfway between 71 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 438 into our formula, we get:
(71 + 438)/2 = 254.5
Thus, the number halfway between 71 and 438 is 254.5.
To check that our answer is correct, we subtract 71 from 254.5 and subtract 254.5 from 438 and compare the two numbers:
254.5 - 71 = 183.5
438 - 254.5 = 183.5
As you can see, the halfway number is 183.5 higher than 71 and 183.5 lower than 438. Therefore, our halfway between answer of 254.5 above is correct.
Halfway Between
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Halfway Between 71 and 439
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