
When you ask "What number is halfway between 5 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=5 and Y=315.

To find the number halfway between 5 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 5 and 315 into our formula, we get:
(5 + 315)/2 = 160
Thus, the number halfway between 5 and 315 is 160.
To check that our answer is correct, we subtract 5 from 160 and subtract 160 from 315 and compare the two numbers:
160 - 5 = 155
315 - 160 = 155
As you can see, the halfway number is 155 higher than 5 and 155 lower than 315. Therefore, our halfway between answer of 160 above is correct.
Halfway Between
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Halfway Between 5 and 316
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