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Chapter Page 1. NUMBERS 1 A. Real Numbers. 2 B. Directed Numbers. 4 C. Multiplication and Division with Directed Numbers. 5 D. HCF and LCM. 6 E. Fractions. 9 F. Decimals. 14 G. Sequences. 16 H. Approximations. 18 I. Number Bases. 21 A Exam Practice. 30 2. ALGEBRAIC EXPRESSIONS AND CHANGE OF SUBJECT OF FORMULAE 32 A. Like and Unlike Terms. 33 B. Multiplying a Bracket by a Bracket. 34 C. Factors of Algebraic Expressions. 35 D. Factors of Quadratic Expressions. 38 E. HCF and LCM of Algebraic Expressions. 41 F. Simplifying Algebraic Fractions. 42 G. Change of Subject of Formulae. 46 A Summary. 52 A Exam Practice. 53 3. SOLVING EQUATIONS 57 A. Linear Equations. 57 B. Equations with Fractions. 59 C. Linear Simultaneous Equations. 63 D. Quadratic Equations. 68 E. The Quadratic Formula. 70 A Summary. 74 A Exam Practice. 75 4. SETS 77 A. Defining Sets. 78 B. Types of Sets. 80 C. Shading Sets in Venn Diagrams. 85 D. Word Problems in Sets. 90