4024/21 Oct/Nov 2025, Question 2: Order of operations
Cambridge O Level Mathematics 4024 · Paper 21 (Calculator) · Calculator · 2 marks
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The question, in short
Place one pair of brackets in each calculation so that it gives the stated result.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 1 mark
Make 4.2 − 3 × 5 + 1.2 equal 7.2.
- 1(4.2 − 3) × 5 + 1.2 = 1.2 × 5 + 1.2 = 6 + 1.2 = 7.2
Answer(4.2 − 3) × 5 + 1.2 = 7.2
Part (b) · 1 mark
Make 5 − 3² − ∛64 + 2 equal −10.
- 15 − 3² − (∛64 + 2) = 5 − 9 − (4 + 2) = −4 − 6 = −10
Answer5 − 3² − (∛64 + 2) = −10
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Also searched as: 4024/21/O/N/25 · 4024_w25_qp_21 · 4024 w25 21 · question 2.
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