When you ask "What number is halfway between 9 and 214?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=214.
To find the number halfway between 9 and 214, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 214 into our formula, we get:
(9 + 214)/2 = 111.5
Thus, the number halfway between 9 and 214 is 111.5.
To check that our answer is correct, we subtract 9 from 111.5 and subtract 111.5 from 214 and compare the two numbers:
111.5 - 9 = 102.5
214 - 111.5 = 102.5
As you can see, the halfway number is 102.5 higher than 9 and 102.5 lower than 214. Therefore, our halfway between answer of 111.5 above is correct.
Halfway Between
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Halfway Between 9 and 215
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