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0580/13 May/Jun 2021, Question 19: Standard Form

Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 3 marks

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The question, in short

Convert 0.000 74 to standard form, then multiply 4.6 × 10² by 6.7 × 10⁵, giving the result in standard form to 2 significant figures.

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

Part (a) · 1 mark

Express 0.000 74 in standard form.

  1. 10.00074 = 7.4 ÷ 10000
  2. 2= 7.4 × 10⁻⁴

Answer7.4 × 10⁻⁴

Part (b) · 2 marks

Work out 4.6 × 10² × 6.7 × 10⁵ and give the answer in standard form to 2 significant figures.

  1. 14.6 × 6.7 = 30.82
  2. 230.82 × 10⁷ = 3.082 × 10⁸
  3. 3≈ 3.1 × 10⁸

Answer3.1 × 10⁸

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Also searched as: 0580/13/M/J/21 · 0580_s21_qp_13 · 0580 s21 13 · question 19.
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