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 ...
Sometimes we do not always need to give detailed answers to problems - we just want a rough idea. When we are faced with a large number, we could round it off to the nearest thousand, or nearest ...
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 ...
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, ...
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