Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. So far we've talked about the big ideas behind significant ...

The first two significant figures are 5 and 2. As the next digit is 4 the 2 stays as it is. Therefore 5246 rounds to 5200 to 2 significant figures. (Notice that we must put in zeros to keep the number ...

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The method of rounding to a significant figure is often used as it can be applied to any kind of number, regardless of how big or small it is. When a newspaper reports a lottery winner has won £3 ...