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0580/12 May/Jun 2023, Question 18: Standard Form

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks

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The question, in short

Convert 45 000 to standard form, then multiply 6.75 × 10⁻³ by 4.2 × 10⁵ and give the result in standard form.

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

Part (a) · 1 mark

Express 45 000 in standard form.

  1. 145 000 = 4.5 × 10 000
  2. 2= 4.5 × 10⁴

Answer4.5 × 10⁴

Part (b) · 1 mark

Work out 6.75 × 10⁻³ × 4.2 × 10⁵, giving the answer in standard form.

  1. 16.75 × 4.2 = 28.35 and 10⁻³ × 10⁵ = 10²
  2. 228.35 × 10² = 2835
  3. 3= 2.835 × 10³

Answer2.835 × 10³

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Also searched as: 0580/12/M/J/23 · 0580_s23_qp_12 · 0580 s23 12 · question 18.
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