When you ask "What number is halfway between 15 and 316?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=316.
To find the number halfway between 15 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 316 into our formula, we get:
(15 + 316)/2 = 165.5
Thus, the number halfway between 15 and 316 is 165.5.
To check that our answer is correct, we subtract 15 from 165.5 and subtract 165.5 from 316 and compare the two numbers:
165.5 - 15 = 150.5
316 - 165.5 = 150.5
As you can see, the halfway number is 150.5 higher than 15 and 150.5 lower than 316. Therefore, our halfway between answer of 165.5 above is correct.
Halfway Between
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Halfway Between 15 and 317
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