When you ask "What number is halfway between 13 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=13 and Y=312.
To find the number halfway between 13 and 312, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 312 into our formula, we get:
(13 + 312)/2 = 162.5
Thus, the number halfway between 13 and 312 is 162.5.
To check that our answer is correct, we subtract 13 from 162.5 and subtract 162.5 from 312 and compare the two numbers:
162.5 - 13 = 149.5
312 - 162.5 = 149.5
As you can see, the halfway number is 149.5 higher than 13 and 149.5 lower than 312. Therefore, our halfway between answer of 162.5 above is correct.
Halfway Between
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