When you ask "What number is halfway between 30 and 797?" 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=797.
To find the number halfway between 30 and 797, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 797 into our formula, we get:
(30 + 797)/2 = 413.5
Thus, the number halfway between 30 and 797 is 413.5.
To check that our answer is correct, we subtract 30 from 413.5 and subtract 413.5 from 797 and compare the two numbers:
413.5 - 30 = 383.5
797 - 413.5 = 383.5
As you can see, the halfway number is 383.5 higher than 30 and 383.5 lower than 797. Therefore, our halfway between answer of 413.5 above is correct.
Halfway Between
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Halfway Between 30 and 798
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