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4MA1/2FR Jun 2020, Question 16: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 4 marks

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The question, in short

Convert numbers between standard form and ordinary form, and add two numbers given in standard form.

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

Part (a) · 1 mark

Write 2.46 × 10⁶ as an ordinary number.

  1. 12.46 × 10⁶ = 2.46 × 1,000,000
  2. 22.46 × 1,000,000 = 2,460,000

Answer2 460 000

Part (b) · 1 mark

Write 0.000 74 in standard form.

  1. 10.00074 = 7.4 ÷ 10,000
  2. 210,000 = 10⁴
  3. 3so 0.00074 = 7.4 × 10⁻⁴

Answer7.4 × 10⁻⁴

Part (c) · 2 marks

Work out (5.6 × 10⁶) + (2.3 × 10⁵).

  1. 15.6 × 10⁶ = 5,600,000
  2. 22.3 × 10⁵ = 230,000
  3. 35,600,000 + 230,000 = 5,830,000

Answer5 830 000

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