We are all faced with calculations on a day-to-day basis. Will we have enough money for the shopping? Do we have enough room on the videotape if we record EastEnders and the Simpsons? It is easy to find an exact answer to these problems with the help of a calculator, but this is not always necessary or practical. In this Revision Bite we are going to look at ways of simplifying the problems in order to find approximate solutions.
