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4MA1/1H Jan 2019, Question 7: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 4 marks

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The question, in short

Using a table of four ocean volumes in km³, convert a value to an ordinary number, total the four volumes, and express another volume in standard form.

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

Part (a) · 1 mark

Convert 7.18 × 10⁷ into an ordinary number.

  1. 110⁷ means move the decimal point 7 places right
  2. 27.18 × 10⁷ = 71800000

Answer71800000

Part (b) · 2 marks

Add the four ocean volumes from the table and give the total in km³.

  1. 1Write each volume in terms of 10⁸: 0.188 + 3.10 + 2.64 + 0.718
  2. 2= 6.646
  3. 3Total = 6.646 × 10⁸

Answer6.646 × 10⁸

Part (c) · 1 mark

Write 9 880 000 km³ in standard form.

  1. 1Move the decimal point 6 places left to get 9.88
  2. 29 880 000 = 9.88 × 10⁶

Answer9.88 × 10⁶

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