MATHEMATICS ENCYCLOPEDIA

An arithmetic expression involving several numbers and multiple operations is not as easy as operations involving two numbers. BODMAS is used to solve the above expression. BODMAS is acronym for  B - Brackets O - Orders ( numbers involving powers and square roots ) D - Division M - Multiplication A - Addition S - Subtraction Start with brackets and follow the above rule from 1 to 6.

There are many expressions having square roots in their denominators. If the denominators are free from square roots then addition, substraction, multiplication and division will be more easy.  Rationalisation means the conversion of denominator into a rational number. You have to multiply both numerator and denominator by irrational number to make the denominator rational. The number multiplied is called rationalisation factor.