When you ask "What number is halfway between 9 and 206?" 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=206.
To find the number halfway between 9 and 206, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 206 into our formula, we get:
(9 + 206)/2 = 107.5
Thus, the number halfway between 9 and 206 is 107.5.
To check that our answer is correct, we subtract 9 from 107.5 and subtract 107.5 from 206 and compare the two numbers:
107.5 - 9 = 98.5
206 - 107.5 = 98.5
As you can see, the halfway number is 98.5 higher than 9 and 98.5 lower than 206. Therefore, our halfway between answer of 107.5 above is correct.
Halfway Between
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Halfway Between 9 and 207
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