When you ask "What number is halfway between 71 and 354?" 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=354.
To find the number halfway between 71 and 354, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 354 into our formula, we get:
(71 + 354)/2 = 212.5
Thus, the number halfway between 71 and 354 is 212.5.
To check that our answer is correct, we subtract 71 from 212.5 and subtract 212.5 from 354 and compare the two numbers:
212.5 - 71 = 141.5
354 - 212.5 = 141.5
As you can see, the halfway number is 141.5 higher than 71 and 141.5 lower than 354. Therefore, our halfway between answer of 212.5 above is correct.
Halfway Between
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Halfway Between 71 and 355
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