When you ask "What number is halfway between 11 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=11 and Y=316.
To find the number halfway between 11 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 316 into our formula, we get:
(11 + 316)/2 = 163.5
Thus, the number halfway between 11 and 316 is 163.5.
To check that our answer is correct, we subtract 11 from 163.5 and subtract 163.5 from 316 and compare the two numbers:
163.5 - 11 = 152.5
316 - 163.5 = 152.5
As you can see, the halfway number is 152.5 higher than 11 and 152.5 lower than 316. Therefore, our halfway between answer of 163.5 above is correct.
Halfway Between
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Halfway Between 11 and 317
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