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4MA1/1FR Jan 2023, Question 11: Using a Calculator

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1FR (Foundation) · Calculator · 3 marks

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The question, in short

Calculate the value of (2.5 + 3.6)/12.7 + 8.2/(5 × 3.6) as a decimal, showing all calculator display figures, then round the result to 3 significant figures.

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Part (a) · 2 marks

Work out (2.5 + 3.6)/12.7 + 8.2/(5 × 3.6) as a decimal and write every figure shown on the calculator display.

  1. 1First fraction: 2.5 + 3.6 = 6.1, and 6.1 ÷ 12.7 = 0.480314961
  2. 2Second fraction: 5 × 3.6 = 18, and 8.2 ÷ 18 = 0.455555556
  3. 30.480314961 + 0.455555556 = 0.935870517

Answer0.935870517

Part (b) · 1 mark

Write the answer from part (a) correct to 3 significant figures.

  1. 10.935870517 to 3 significant figures: the figures are 9, 3 and 5
  2. 2The next figure is 8, so round up
  3. 30.935870517 = 0.936 to 3 s.f.

Answer0.936

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