When you ask "What number is halfway between 20 and 385?" 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=385.
To find the number halfway between 20 and 385, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 385 into our formula, we get:
(20 + 385)/2 = 202.5
Thus, the number halfway between 20 and 385 is 202.5.
To check that our answer is correct, we subtract 20 from 202.5 and subtract 202.5 from 385 and compare the two numbers:
202.5 - 20 = 182.5
385 - 202.5 = 182.5
As you can see, the halfway number is 182.5 higher than 20 and 182.5 lower than 385. Therefore, our halfway between answer of 202.5 above is correct.
Halfway Between
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Halfway Between 20 and 386
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