When you ask "What number is halfway between 3 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=3 and Y=315.
To find the number halfway between 3 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 315 into our formula, we get:
(3 + 315)/2 = 159
Thus, the number halfway between 3 and 315 is 159.
To check that our answer is correct, we subtract 3 from 159 and subtract 159 from 315 and compare the two numbers:
159 - 3 = 156
315 - 159 = 156
As you can see, the halfway number is 156 higher than 3 and 156 lower than 315. Therefore, our halfway between answer of 159 above is correct.
Halfway Between
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Halfway Between 3 and 316
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