RS Aggarwal Solutions for Class 6 Chapter 6 “Simplification” describes here. Simplification is the process of replacing a mathematical expression by an equivalent one, that is simpler (usually shorter), for example. Simplification of a fraction to an irreducible fraction. Simplification of expressions, in computer algebra. In this Chapter, we perform division, multiplication, addition and subtraction operations strictly using four kinds of brackets. Use of brackets and square roots are the main topics to solve problems.