When you ask "What number is halfway between 20 and 447?" 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=447.
To find the number halfway between 20 and 447, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 447 into our formula, we get:
(20 + 447)/2 = 233.5
Thus, the number halfway between 20 and 447 is 233.5.
To check that our answer is correct, we subtract 20 from 233.5 and subtract 233.5 from 447 and compare the two numbers:
233.5 - 20 = 213.5
447 - 233.5 = 213.5
As you can see, the halfway number is 213.5 higher than 20 and 213.5 lower than 447. Therefore, our halfway between answer of 233.5 above is correct.
Halfway Between
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Halfway Between 20 and 448
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