Surds The square roots of most numbers cannot be found exactly. For example, the value of √3 cannot be written exactly as a fraction or a decimal. - ppt download
Multiplication of Surds
Change between fractions, decimals & surds (radicals) using SD button (Casio calculator, fx-83GT) - YouTube
Ascending and Descending Order of Surds
How to Solve Surd Questions with the Scientific Calculator FX-991ES Plus - YouTube