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Cambridge IGCSE Mathematics

1.18Surds

Surds in Cambridge IGCSE Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic21 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 1.18.1Extended: simplify surds and expressions that contain surds.
  2. 1.18.2Extended: rationalise the denominator of a fraction.

Lessons

  • Surds

    35 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Surds: sample question

1 mark

Work out 5×20\sqrt{5} \times \sqrt{20}.

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