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0580/11 Oct/Nov 2023, Question 21: Standard Form

Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 4 marks

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The question, in short

Convert two given values into standard form, then multiply 8.2 × 10⁻¹ by 150 000 and express the result in standard form.

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

Part (ai) · 1 mark

Write 45 000 in standard form.

  1. 145 000 = 4.5 × 10 000 = 4.5 × 10⁴

Answer4.5 × 10⁴

Part (aii) · 1 mark

Write 0.0063 in standard form.

  1. 10.0063 = 6.3 × 0.001 = 6.3 × 10⁻³

Answer6.3 × 10⁻³

Part (b) · 2 marks

Work out 8.2 × 10⁻¹ × 150 000, giving the answer in standard form.

  1. 18.2 × 10⁻¹ × 150 000 = 0.82 × 150 000 = 123 000
  2. 2= 1.23 × 10⁵

Answer1.23 × 10⁵

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Also searched as: 0580/11/O/N/23 · 0580_w23_qp_11 · 0580 w23 11 · question 21.
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