4024/11 Oct/Nov 2020, Question 4: Rounding
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Three short arithmetic tasks: round 3456.789 to the nearest 100, find √160000, and work out 1 − 3⁻¹.
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Part (a) · 1 mark
Round 3456.789 to the nearest 100.
- 13456.789: tens digit 5, so round up
- 2= 3500
Answer3500
Part (b) · 1 mark
Evaluate the square root of 160000.
- 1√160000 = √16 × √10000 = 4 × 100
- 2= 400
Answer400
Part (c) · 1 mark
Evaluate 1 − 3⁻¹.
- 13⁻¹ = 1/3
- 21 − 1/3 = 2/3
Answer2/3
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Also searched as: 4024/11/O/N/20 · 4024_w20_qp_11 · 4024 w20 11 · question 4.
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