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4MA1/1F Jan 2023, Question 24: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks

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The question, in short

Convert a small number in standard form to an ordinary number, then divide two numbers in standard form 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

Write 6.25 × 10⁻⁴ as an ordinary number.

  1. 16.25 × 10⁻⁴ = 0.000625

Answer0.000625

Part (b) · 2 marks

Work out (2.4 × 10¹²) ÷ (9.6 × 10⁴), giving the answer in standard form.

  1. 1Divide the numbers: 2.4 ÷ 9.6 = 0.25
  2. 2Divide the powers: 10¹² ÷ 10⁴ = 10⁸
  3. 30.25 × 10⁸ = 2.5 × 10⁷

Answer2.5 × 10⁷

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