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0580/43 May/Jun 2026, Question 16: Calculating with Bounds

Cambridge IGCSE Mathematics 0580 · Paper 43 (Extended) · Calculator · 2 marks

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The question, in short

Rectangle sides 4.2 cm and 6.8 cm are each correct to the nearest millimetre; find the lower bound of its area.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Solution · 2 marks

  1. 1Lower bounds: 4.15 cm and 6.75 cm
  2. 2Lower bound of area = 4.15 × 6.75
  3. 3= 28.0125 cm²

Answer28.0125

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