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0580/12 Feb/Mar 2025, Question 11: Understanding Decimal Place Value

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Non-calculator · 2 marks

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The question, in short

Using the given fact that 19.5 × 20.4 = 397.8, work out the answers to two related decimal calculations.

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Part (a) · 1 mark

Work out the value of 1.95 × 2.04 using the given multiplication fact.

  1. 11.95 = 19.5 ÷ 10 and 2.04 = 20.4 ÷ 10
  2. 2So the answer is 397.8 ÷ 100
  3. 3= 3.978

Answer3.978

Part (b) · 1 mark

Work out the value of 3978 ÷ 204 using the given multiplication fact.

  1. 1397.8 ÷ 20.4 = 19.5
  2. 23978 ÷ 204 = (397.8 × 10) ÷ (20.4 × 10)
  3. 3= 19.5

Answer19.5

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