Chapter 4

 Basic Algebra and Algebraic Manipulation

4.1 Introduction to Algebra

Online whiteboard for AlgeDiscs

via mathsbot.com

Visualise Algebraic Expressions with AlgeDiscs.

4.2 Simplification of Linear Expressions

Online Practice for Linear Expressions

via Transum.org

Self-check questions with various levels of difficulty.

4.3 Expansion of Linear Expressions

4.4 Factorisation of Algebraic Expressions