When you ask "What number is halfway between 12 and 23?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=12 and Y=23.
To find the number halfway between 12 and 23, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 23 into our formula, we get:
(12 + 23)/2 = 17.5
Thus, the number halfway between 12 and 23 is 17.5.
To check that our answer is correct, we subtract 12 from 17.5 and subtract 17.5 from 23 and compare the two numbers:
17.5 - 12 = 5.5
23 - 17.5 = 5.5
As you can see, the halfway number is 5.5 higher than 12 and 5.5 lower than 23. Therefore, our halfway between answer of 17.5 above is correct.
Halfway Between
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Halfway Between 12 and 24
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