When you ask "What number is halfway between 20 and 247?" 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=247.
To find the number halfway between 20 and 247, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 247 into our formula, we get:
(20 + 247)/2 = 133.5
Thus, the number halfway between 20 and 247 is 133.5.
To check that our answer is correct, we subtract 20 from 133.5 and subtract 133.5 from 247 and compare the two numbers:
133.5 - 20 = 113.5
247 - 133.5 = 113.5
As you can see, the halfway number is 113.5 higher than 20 and 113.5 lower than 247. Therefore, our halfway between answer of 133.5 above is correct.
Halfway Between
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Halfway Between 20 and 248
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