When you ask "What number is halfway between 21 and 568?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=568.
To find the number halfway between 21 and 568, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 568 into our formula, we get:
(21 + 568)/2 = 294.5
Thus, the number halfway between 21 and 568 is 294.5.
To check that our answer is correct, we subtract 21 from 294.5 and subtract 294.5 from 568 and compare the two numbers:
294.5 - 21 = 273.5
568 - 294.5 = 273.5
As you can see, the halfway number is 273.5 higher than 21 and 273.5 lower than 568. Therefore, our halfway between answer of 294.5 above is correct.
Halfway Between
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Halfway Between 21 and 569
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