When you ask "What number is halfway between 9 and 201?" 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=201.
To find the number halfway between 9 and 201, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 201 into our formula, we get:
(9 + 201)/2 = 105
Thus, the number halfway between 9 and 201 is 105.
To check that our answer is correct, we subtract 9 from 105 and subtract 105 from 201 and compare the two numbers:
105 - 9 = 96
201 - 105 = 96
As you can see, the halfway number is 96 higher than 9 and 96 lower than 201. Therefore, our halfway between answer of 105 above is correct.
Halfway Between
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Halfway Between 9 and 202
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