0580/11 Oct/Nov 2023, Question 18: Estimation
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 2 marks
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The question, in short
Round 36.9, 24.2, 3.8 and 1.2 to 1 significant figure, then use these to estimate the value of (36.9 + 24.2)/(3.8 − 1.2), showing all working.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 136.9 ≈ 40, 24.2 ≈ 20, 3.8 ≈ 4, 1.2 ≈ 1
- 2(40 + 20)/(4 − 1) = 60/3
- 3= 20
Answer20
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