Scientific American presentsMath Dudeby Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. In the last Math Dude episode, we learned the ins and outs of ...

When it’s not necessary to give an exact value, numbers can be rounded. Rounding means making a number simpler but keeping its value close to what it is. When rounding numbers the result is less ...

It’s so tempting to round off numbers and present your audience with clear, whole numbers rather than cluttering up the text with decimal points and a string of digits. Sometimes rounding a number up ...

Use rounded values to estimate close the answer to a calculation. This is a useful non-calculator skill. Refresh your knowledge with these guides on rounding and significant figures. Rounding to ...

It’s so tempting to round off numbers and present your audience with pretty whole numbers rather than cluttering up the text with decimal points and a string of digits. Sometimes rounding a number up ...