When you ask "What number is halfway between 7 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=7 and Y=216.
To find the number halfway between 7 and 216, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 216 into our formula, we get:
(7 + 216)/2 = 111.5
Thus, the number halfway between 7 and 216 is 111.5.
To check that our answer is correct, we subtract 7 from 111.5 and subtract 111.5 from 216 and compare the two numbers:
111.5 - 7 = 104.5
216 - 111.5 = 104.5
As you can see, the halfway number is 104.5 higher than 7 and 104.5 lower than 216. Therefore, our halfway between answer of 111.5 above is correct.
Halfway Between
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Halfway Between 7 and 217
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