When you ask "What number is halfway between 20 and 833?" 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=833.
To find the number halfway between 20 and 833, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 833 into our formula, we get:
(20 + 833)/2 = 426.5
Thus, the number halfway between 20 and 833 is 426.5.
To check that our answer is correct, we subtract 20 from 426.5 and subtract 426.5 from 833 and compare the two numbers:
426.5 - 20 = 406.5
833 - 426.5 = 406.5
As you can see, the halfway number is 406.5 higher than 20 and 406.5 lower than 833. Therefore, our halfway between answer of 426.5 above is correct.
Halfway Between
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Halfway Between 20 and 834
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