When you ask "What number is halfway between 30 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=30 and Y=197.
To find the number halfway between 30 and 197, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 197 into our formula, we get:
(30 + 197)/2 = 113.5
Thus, the number halfway between 30 and 197 is 113.5.
To check that our answer is correct, we subtract 30 from 113.5 and subtract 113.5 from 197 and compare the two numbers:
113.5 - 30 = 83.5
197 - 113.5 = 83.5
As you can see, the halfway number is 83.5 higher than 30 and 83.5 lower than 197. Therefore, our halfway between answer of 113.5 above is correct.
Halfway Between
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Halfway Between 30 and 198
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