When you ask "What number is halfway between 9 and 197?" 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=197.
To find the number halfway between 9 and 197, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 197 into our formula, we get:
(9 + 197)/2 = 103
Thus, the number halfway between 9 and 197 is 103.
To check that our answer is correct, we subtract 9 from 103 and subtract 103 from 197 and compare the two numbers:
103 - 9 = 94
197 - 103 = 94
As you can see, the halfway number is 94 higher than 9 and 94 lower than 197. Therefore, our halfway between answer of 103 above is correct.
Halfway Between
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Halfway Between 9 and 198
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