FORM 4&5 UNIT 4 1 Unit Content Form 4 & 5 Unit 4 Lesson 1 – Simplifying Surds Form 4 & 5 Unit 4 Lesson 2 – Addition and Subtraction of Surds Form 4 & 5 Unit 4 Lesson 3 – Multiplication and Division of Surds Form 4 & 5 Unit 4 Lesson 4 – Conjugate Surds Form 4 & 5 Unit 4 Lesson 5 – Rationalisation of the Denominator of a Fraction