0580/12 May/Jun 2022, Question 5: Written Methods of Division
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Apply Arania's doubling method to compute 135 ÷ 12 1/2 without a calculator, showing the equivalent fraction steps.
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Solution · 2 marks
- 1Double both numbers: 135 ÷ 12 1/2 = 270 ÷ 25
- 2Double again: = 540 ÷ 50
- 3Double again: = 1080 ÷ 100
- 4= 10.8
Answer135 ÷ 12 1/2 = 270 ÷ 25 = 540 ÷ 50 = 1080 ÷ 100 = 10.8
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