
When you ask "What number is halfway between 23 and 310?" 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=310.

To find the number halfway between 23 and 310, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 310 into our formula, we get:
(23 + 310)/2 = 166.5
Thus, the number halfway between 23 and 310 is 166.5.
To check that our answer is correct, we subtract 23 from 166.5 and subtract 166.5 from 310 and compare the two numbers:
166.5 - 23 = 143.5
310 - 166.5 = 143.5
As you can see, the halfway number is 143.5 higher than 23 and 143.5 lower than 310. Therefore, our halfway between answer of 166.5 above is correct.
Halfway Between
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Halfway Between 23 and 311
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