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4024/12 May/Jun 2026, Question 14: Standard form

Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 4 marks

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The question, in short

Convert 350 000 to standard form, convert 2.7 × 10⁻⁴ to an ordinary number, and add 1.3 × 10¹² and 4.5 × 10¹³ giving 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

350 000 in standard form.

  1. 1350 000 = 3.5 × 100 000
  2. 2= 3.5 × 10⁵

Answer3.5 × 10⁵

Part (b) · 1 mark

2.7 × 10⁻⁴ as an ordinary number.

  1. 1Move the decimal point 4 places left
  2. 20.00027

Answer0.00027

Part (c) · 2 marks

1.3 × 10¹² + 4.5 × 10¹³ in standard form.

  1. 11.3 × 10¹² = 0.13 × 10¹³
  2. 20.13 × 10¹³ + 4.5 × 10¹³ = 4.63 × 10¹³

Answer4.63 × 10¹³

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