4MA1/1F Jun 2020, Question 10: 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 (67.8 + 4.6²) ÷ √56, record the full display, then round that value to 2 significant figures.
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Part (a) · 2 marks
Calculate (67.8 + 4.6²) ÷ √56 on a calculator and write every digit shown on the display.
- 1Top: 4.6² = 21.16, and 67.8 + 21.16 = 88.96
- 2Bottom: √56 = 7.483314774
- 388.96 ÷ 7.483314774 = 11.88778004
Answer11.88778004
Part (b) · 1 mark
Round the given value 11.88778004 to 2 significant figures.
- 1The first two significant figures of 11.88778004 are 1 and 1
- 2The next figure is 8, so round up: 12
Answer12
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