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4MA1/2H Jun 2023, Question 6: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 2 marks

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The question, in short

Convert between standard form and ordinary numbers: express 76 000 000 in standard form, and write 5.4 × 10⁻⁴ as an ordinary number.

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

Part (a) · 1 mark

Write 76 000 000 in standard form.

  1. 1Move the decimal point 7 places: 76 000 000 = 7.6 × 10 000 000
  2. 210 000 000 = 10⁷, so 7.6 × 10⁷

Answer7.6 × 10⁷

Part (b) · 1 mark

Write 5.4 × 10⁻⁴ as an ordinary number.

  1. 110⁻⁴ means divide by 10 000
  2. 25.4 ÷ 10 000 = 0.00054

Answer0.00054

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