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The Power of Number and Proportionality · Autumn Term

Rationalising Denominators with Surds

Students will learn to rationalize the denominator of fractions containing surds, including those with binomial denominators.

Key Questions

  1. Explain the purpose of rationalizing a denominator containing a surd.
  2. Analyze the process of multiplying by the conjugate to rationalize binomial surd denominators.
  3. Construct examples where rationalizing simplifies calculations significantly.

National Curriculum Attainment Targets

KS3: Mathematics - Number
Year: Year 9
Subject: Mathematics
Unit: The Power of Number and Proportionality
Period: Autumn Term

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