When you ask "What number is halfway between 30 and 679?" 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=679.
To find the number halfway between 30 and 679, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 679 into our formula, we get:
(30 + 679)/2 = 354.5
Thus, the number halfway between 30 and 679 is 354.5.
To check that our answer is correct, we subtract 30 from 354.5 and subtract 354.5 from 679 and compare the two numbers:
354.5 - 30 = 324.5
679 - 354.5 = 324.5
As you can see, the halfway number is 324.5 higher than 30 and 324.5 lower than 679. Therefore, our halfway between answer of 354.5 above is correct.
Halfway Between
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Halfway Between 30 and 680
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