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0580/43 Oct/Nov 2025, Question 11: Standard Form

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

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The question, in short

From the list of six numbers, identify which is not in standard form, then pick out the largest and the smallest values.

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

Solution · 2 marks

  1. 10.3 is not between 1 and 10, so 0.3 × 10⁻² is not in standard form
  2. 2Largest power of 10 is 10¹²: largest is 1.3 × 10¹²
  3. 30.3 × 10⁻² = 0.003 and 2.03 × 10⁻⁵ = 0.0000203
  4. 4Smallest is 2.03 × 10⁻⁵

AnswerNot in standard form: 0.3 × 10⁻²; largest: 1.3 × 10¹²; smallest: 2.03 × 10⁻⁵

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