When you ask "What number is halfway between 20 and 413?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=413.
To find the number halfway between 20 and 413, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 413 into our formula, we get:
(20 + 413)/2 = 216.5
Thus, the number halfway between 20 and 413 is 216.5.
To check that our answer is correct, we subtract 20 from 216.5 and subtract 216.5 from 413 and compare the two numbers:
216.5 - 20 = 196.5
413 - 216.5 = 196.5
As you can see, the halfway number is 196.5 higher than 20 and 196.5 lower than 413. Therefore, our halfway between answer of 216.5 above is correct.
Halfway Between
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Halfway Between 20 and 414
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