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4MA1/1F Jun 2022, Question 23: Standard Form

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 2 marks

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The question, in short

Convert between standard form and ordinary numbers: write 0.000 089 in standard form, and write 8.34 × 10⁴ 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 0.000 089 in standard form.

  1. 1Move the decimal point 5 places to the right to get 8.9
  2. 2The number is less than 1, so the power is negative: 8.9 × 10⁻⁵

Answer8.9 × 10⁻⁵

Part (b) · 1 mark

Write 8.34 × 10⁴ as an ordinary number.

  1. 1× 10⁴ moves the decimal point 4 places to the right
  2. 28.34 × 10⁴ = 83 400

Answer83 400

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