When you ask "What number is halfway between 23 and 312?" 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=312.
To find the number halfway between 23 and 312, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 312 into our formula, we get:
(23 + 312)/2 = 167.5
Thus, the number halfway between 23 and 312 is 167.5.
To check that our answer is correct, we subtract 23 from 167.5 and subtract 167.5 from 312 and compare the two numbers:
167.5 - 23 = 144.5
312 - 167.5 = 144.5
As you can see, the halfway number is 144.5 higher than 23 and 144.5 lower than 312. Therefore, our halfway between answer of 167.5 above is correct.
Halfway Between
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