When you ask "What number is halfway between 30 and 671?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=671.
To find the number halfway between 30 and 671, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 671 into our formula, we get:
(30 + 671)/2 = 350.5
Thus, the number halfway between 30 and 671 is 350.5.
To check that our answer is correct, we subtract 30 from 350.5 and subtract 350.5 from 671 and compare the two numbers:
350.5 - 30 = 320.5
671 - 350.5 = 320.5
As you can see, the halfway number is 320.5 higher than 30 and 320.5 lower than 671. Therefore, our halfway between answer of 350.5 above is correct.
Halfway Between
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Halfway Between 30 and 672
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