When you ask "What number is halfway between 39 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=39 and Y=312.
To find the number halfway between 39 and 312, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 312 into our formula, we get:
(39 + 312)/2 = 175.5
Thus, the number halfway between 39 and 312 is 175.5.
To check that our answer is correct, we subtract 39 from 175.5 and subtract 175.5 from 312 and compare the two numbers:
175.5 - 39 = 136.5
312 - 175.5 = 136.5
As you can see, the halfway number is 136.5 higher than 39 and 136.5 lower than 312. Therefore, our halfway between answer of 175.5 above is correct.
Halfway Between
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