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4MA1/2HR Jan 2020, Question 10: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2HR (Higher) · Calculator · 3 marks

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The question, in short

Using the ocean surface areas in the table, find a difference in standard form and a ratio rounded to a whole number.

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

Part (a) · 2 marks

Subtract the Indian Ocean area from the Atlantic Ocean area, giving the result in standard form.

  1. 11.06 × 10⁸ − 6.86 × 10⁷ = 106000000 − 68600000 = 37400000
  2. 237400000 = 3.74 × 10⁷

Answer3.74 × 10⁷

Part (b) · 1 mark

Divide the Pacific Ocean area by the Arctic Ocean area and round the result to the nearest whole number.

  1. 1k = 1.56 × 10⁸ ÷ (1.41 × 10⁷)
  2. 2156 000 000 ÷ 14 100 000 = 11.06…
  3. 3To the nearest whole number: 11

Answer11

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