4MA1/2H Jun 2018, Question 15: Calculating with Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 2 marks
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The question, in short
Given e = 8.31 and f = 0.65, each rounded to 2 decimal places, find the lower bound of e − f, showing working.
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Solution · 2 marks
- 1Smallest e − f = smallest e − largest f.
- 2Lower bound of e = 8.305; upper bound of f = 0.655
- 38.305 − 0.655 = 7.65
Answer7.65
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