When you ask "What number is halfway between 13 and 216?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=13 and Y=216.
To find the number halfway between 13 and 216, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 216 into our formula, we get:
(13 + 216)/2 = 114.5
Thus, the number halfway between 13 and 216 is 114.5.
To check that our answer is correct, we subtract 13 from 114.5 and subtract 114.5 from 216 and compare the two numbers:
114.5 - 13 = 101.5
216 - 114.5 = 101.5
As you can see, the halfway number is 101.5 higher than 13 and 101.5 lower than 216. Therefore, our halfway between answer of 114.5 above is correct.
Halfway Between
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Halfway Between 13 and 217
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