4MA1/2F Jan 2022, Question 8: Estimation
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 3 marks
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The question, in short
Round 8.23, 181 and 0.482 each to one significant figure, then use these to estimate the value of (8.23 × 181) ÷ 0.482, showing working.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 18.23 to 1 significant figure is 8
- 2181 to 1 significant figure is 200
- 30.482 to 1 significant figure is 0.5
- 4(8 × 200) ÷ 0.5 = 1600 ÷ 0.5
- 51600 ÷ 0.5 = 3200
Answer3200
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