0580/12 May/Jun 2025, Question 12: Written Methods of Multiplication
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Non-calculator · 2 marks
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The question, in short
Use Tim's method, shown for 53 × 99 as 53 × 100 − 53, to work out 85 × 99.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 185 × 99 = 85 × 100 − 85
- 2= 8500 − 85 = 8415
Answer8415
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