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O-LevelMathematicsNumber4024/12 · Oct/Nov 2024 · Q132 Marks

Evaluate. 5×10^7-8×10^6 Give your answer in standard form.

  1. Evaluate. 5×10^7-8×10^6 Give your answer in standard form.[2]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.

  1. [2] 4.2 × 10^7 cao
  2. [2] B1 for answer figs 42
  3. [2] or for answer A × 10^7 with 1 ≤ A < 10
  4. [2] or M1 for 50 × 10^6 or 0.8 × 10^7
  5. [2] or both numbers adjusted to the same power of 10
  6. [2] or for 50 000 000 and 8 000 000 seen

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About this question

Topic
Number, O-Level Mathematics (syllabus 4024). Structured question, 2 marks.
Source
O-Level Mathematics, Oct/Nov 2024 Paper 1 Variant 2, question 13.

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