Suppose I am working on a problem and I wish to calculate the density of something. I measure the mass to be m = 24.5 grams and the volume is V = 10 cm 3. In this case the density would be: ALERT!

Leave the digit the same if the next digit is less than 5 (this is called rounding down) but increase it by 1 if the next digit is 5 or more (this is called rounding up). The rounded value must be a ...

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 ...

Another way of rounding numbers is to count only the first few digits (maybe \(1\), \(2\) or \(3\) figures) that have a value attached to them. This method of rounding is called significant figures ...

Scientific American presentsMath Dudeby Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. Did you know that your calculator occasionally lies to you? Okay, ...