4MA1/1F Jun 2019, Question 12: Using a Calculator
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Use a calculator to evaluate (24.3 − 16.8) ÷ 0.18 + √67.4, record the full display, then round that result to 1 significant figure.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 2 marks
Calculate the expression on a calculator and write down every figure shown on the display.
- 124.3 − 16.8 = 7.5 and 7.5 ÷ 0.18 = 41.666…
- 2√67.4 = 8.20975030…
- 341.666… + 8.20975030… = 49.87641697
Answer49.87641697
Part (b) · 1 mark
Round the answer from part (a) to 1 significant figure.
- 149.876… to 1 significant figure: the first figure is in the tens
- 2The next figure is 9, so round up to 50
Answer50
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