When you ask "What number is halfway between 16 and 647?" 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=647.
To find the number halfway between 16 and 647, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 647 into our formula, we get:
(16 + 647)/2 = 331.5
Thus, the number halfway between 16 and 647 is 331.5.
To check that our answer is correct, we subtract 16 from 331.5 and subtract 331.5 from 647 and compare the two numbers:
331.5 - 16 = 315.5
647 - 331.5 = 315.5
As you can see, the halfway number is 315.5 higher than 16 and 315.5 lower than 647. Therefore, our halfway between answer of 331.5 above is correct.
Halfway Between
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Halfway Between 16 and 648
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