When you ask "What number is halfway between 28 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=28 and Y=315.
To find the number halfway between 28 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 315 into our formula, we get:
(28 + 315)/2 = 171.5
Thus, the number halfway between 28 and 315 is 171.5.
To check that our answer is correct, we subtract 28 from 171.5 and subtract 171.5 from 315 and compare the two numbers:
171.5 - 28 = 143.5
315 - 171.5 = 143.5
As you can see, the halfway number is 143.5 higher than 28 and 143.5 lower than 315. Therefore, our halfway between answer of 171.5 above is correct.
Halfway Between
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Halfway Between 28 and 316
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