When you ask "What number is halfway between 16 and 621?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=16 and Y=621.
To find the number halfway between 16 and 621, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 621 into our formula, we get:
(16 + 621)/2 = 318.5
Thus, the number halfway between 16 and 621 is 318.5.
To check that our answer is correct, we subtract 16 from 318.5 and subtract 318.5 from 621 and compare the two numbers:
318.5 - 16 = 302.5
621 - 318.5 = 302.5
As you can see, the halfway number is 302.5 higher than 16 and 302.5 lower than 621. Therefore, our halfway between answer of 318.5 above is correct.
Halfway Between
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Halfway Between 16 and 622
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