When you ask "What number is halfway between 20 and 283?" 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=283.
To find the number halfway between 20 and 283, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 283 into our formula, we get:
(20 + 283)/2 = 151.5
Thus, the number halfway between 20 and 283 is 151.5.
To check that our answer is correct, we subtract 20 from 151.5 and subtract 151.5 from 283 and compare the two numbers:
151.5 - 20 = 131.5
283 - 151.5 = 131.5
As you can see, the halfway number is 131.5 higher than 20 and 131.5 lower than 283. Therefore, our halfway between answer of 151.5 above is correct.
Halfway Between
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Halfway Between 20 and 284
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