When you ask "What number is halfway between 20 and 299?" 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=299.
To find the number halfway between 20 and 299, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 299 into our formula, we get:
(20 + 299)/2 = 159.5
Thus, the number halfway between 20 and 299 is 159.5.
To check that our answer is correct, we subtract 20 from 159.5 and subtract 159.5 from 299 and compare the two numbers:
159.5 - 20 = 139.5
299 - 159.5 = 139.5
As you can see, the halfway number is 139.5 higher than 20 and 139.5 lower than 299. Therefore, our halfway between answer of 159.5 above is correct.
Halfway Between
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Halfway Between 20 and 300
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