When you ask "What number is halfway between 23 and 678?" 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=678.
To find the number halfway between 23 and 678, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 678 into our formula, we get:
(23 + 678)/2 = 350.5
Thus, the number halfway between 23 and 678 is 350.5.
To check that our answer is correct, we subtract 23 from 350.5 and subtract 350.5 from 678 and compare the two numbers:
350.5 - 23 = 327.5
678 - 350.5 = 327.5
As you can see, the halfway number is 327.5 higher than 23 and 327.5 lower than 678. Therefore, our halfway between answer of 350.5 above is correct.
Halfway Between
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Halfway Between 23 and 679
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