When you ask "What number is halfway between 20 and 63?" 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=63.
To find the number halfway between 20 and 63, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 63 into our formula, we get:
(20 + 63)/2 = 41.5
Thus, the number halfway between 20 and 63 is 41.5.
To check that our answer is correct, we subtract 20 from 41.5 and subtract 41.5 from 63 and compare the two numbers:
41.5 - 20 = 21.5
63 - 41.5 = 21.5
As you can see, the halfway number is 21.5 higher than 20 and 21.5 lower than 63. Therefore, our halfway between answer of 41.5 above is correct.
Halfway Between
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Halfway Between 20 and 64
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