0580/13 May/Jun 2023, Question 13: Estimation
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 2 marks
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The question, in short
Estimate the value of (6.8 × 10.6)/(3.2 − 0.98) by rounding each number to 1 significant figure, showing all working.
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Solution · 2 marks
- 16.8 ≈ 7, 10.6 ≈ 10, 3.2 ≈ 3, 0.98 ≈ 1
- 2(7 × 10)/(3 − 1) = 70/2
- 3= 35
Answer35
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