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4024/11 Oct/Nov 2020, Question 9: Standard Form

Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks

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The question, in short

Convert a product involving 100² into standard form, then evaluate a division of two numbers written in standard form, 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

Write 0.043 × 100² in standard form.

  1. 10.043 × 100² = 0.043 × 10000 = 430
  2. 2= 4.3 × 10²

Answer4.3 × 10²

Part (b) · 2 marks

Work out (1.2 × 10⁷) ÷ (2 × 10⁻³) and give the answer in standard form.

  1. 1Divide the numbers: 1.2 ÷ 2 = 0.6
  2. 2Divide the powers: 10⁷ ÷ 10⁻³ = 10⁷⁺³ = 10¹⁰
  3. 30.6 × 10¹⁰ = 6 × 10⁹

Answer6 × 10⁹

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Also searched as: 4024/11/O/N/20 · 4024_w20_qp_11 · 4024 w20 11 · question 9.
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