When you ask "What number is halfway between 21 and 300?" 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=300.
To find the number halfway between 21 and 300, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 300 into our formula, we get:
(21 + 300)/2 = 160.5
Thus, the number halfway between 21 and 300 is 160.5.
To check that our answer is correct, we subtract 21 from 160.5 and subtract 160.5 from 300 and compare the two numbers:
160.5 - 21 = 139.5
300 - 160.5 = 139.5
As you can see, the halfway number is 139.5 higher than 21 and 139.5 lower than 300. Therefore, our halfway between answer of 160.5 above is correct.
Halfway Between
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Halfway Between 21 and 301
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