If the next number is 4 or less, we do not round up. \(3\) is the first significant figure, and as the digit after it (\(6\)) is greater than \(5\), you should round up. \(2\) is the first ...

We can use significant figures to get an approximate answer to a problem. We can round off all the numbers ... Remember, the working you do is just as important as the answer.