When you ask "What number is halfway between 23 and 646?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=646.
To find the number halfway between 23 and 646, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 646 into our formula, we get:
(23 + 646)/2 = 334.5
Thus, the number halfway between 23 and 646 is 334.5.
To check that our answer is correct, we subtract 23 from 334.5 and subtract 334.5 from 646 and compare the two numbers:
334.5 - 23 = 311.5
646 - 334.5 = 311.5
As you can see, the halfway number is 311.5 higher than 23 and 311.5 lower than 646. Therefore, our halfway between answer of 334.5 above is correct.
Halfway Between
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Halfway Between 23 and 647
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