When you ask "What number is halfway between 12 and 315?" 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=315.
To find the number halfway between 12 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 315 into our formula, we get:
(12 + 315)/2 = 163.5
Thus, the number halfway between 12 and 315 is 163.5.
To check that our answer is correct, we subtract 12 from 163.5 and subtract 163.5 from 315 and compare the two numbers:
163.5 - 12 = 151.5
315 - 163.5 = 151.5
As you can see, the halfway number is 151.5 higher than 12 and 151.5 lower than 315. Therefore, our halfway between answer of 163.5 above is correct.
Halfway Between
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Halfway Between 12 and 316
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