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Primary 3 Mathematics Measurement Quiz

Free P3 Maths Measurement quiz, LongCat Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Mathematics From Real Exams Generated by LongCat 2.0 LLM Updated 2026-08-17
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Primary 3 Mathematics Quiz - Measurement

Answer Key

Section A: Length (Questions 1–5)

1. (2 marks)

  • Ribbon = 35 cm
  • String is 18 cm shorter: 35 − 18 = 17 cm
  • Answer: 17 cm

2. (2 marks)

  • 1 m = 100 cm
  • 3 m = 3 × 100 = 300 cm
  • 300 + 45 = 345 cm
  • Answer: 345 cm

3. (2 marks)

  • Convert all to cm: 2 m = 200 cm; 150 cm; 2500 mm = 250 cm; 1 m 80 cm = 180 cm
  • Order: 150 cm, 180 cm, 200 cm, 250 cm
  • Answer: 150 cm, 1 m 80 cm, 2 m, 2500 mm

4. (2 marks)

  • Pencil = 16 cm
  • Ruler = 3 × 16 = 48 cm
  • Answer: 48 cm

5. (2 marks)

  • Total distance = 450 + 350 = 800 m
  • 800 m = 0.8 km
  • Answer: 800 m = 0.8 km

Section B: Mass (Questions 6–10)

6. (2 marks)

  • 1 bag = 5 kg
  • 4 bags = 4 × 5 = 20 kg
  • Answer: 20 kg

7. (2 marks)

  • 1 kg = 1000 g
  • 2 kg = 2000 g
  • 2000 + 350 = 2350 g
  • Answer: 2350 g

8. (2 marks)

  • Watermelon = 3 kg 200 g
  • Pineapple = 1 kg 800 g
  • Total: 3 + 1 = 4 kg; 200 + 800 = 1000 g = 1 kg
  • 4 kg + 1 kg = 5 kg 0 g (or 5 kg)
  • Answer: 5 kg 0 g

9. (2 marks)

  • Convert all to g: 1500 g; 2 kg = 2000 g; 1 kg 250 g = 1250 g; 3000 g
  • Order: 1250 g, 1500 g, 2000 g, 3000 g
  • Answer: 1 kg 250 g, 1500 g, 2 kg, 3000 g

10. (2 marks)

  • Box of apples = 4 kg
  • Box of oranges is 1 kg 500 g lighter: 4 kg − 1 kg 500 g = 2 kg 500 g
  • Answer: 2 kg 500 g

Section C: Volume of Liquid (Questions 11–15)

11. (2 marks)

  • 1000 ml = 1 l
  • 750 ml = 0 l 750 ml (or 0.75 l)
  • Answer: 0 l 750 ml

12. (2 marks)

  • 1 l = 1000 ml
  • 4 l = 4000 ml
  • 4000 + 600 = 4600 ml
  • Answer: 4600 ml

13. (2 marks)

  • Jug capacity = 2 l = 2000 ml
  • Water poured = 850 ml
  • More water needed = 2000 − 850 = 1150 ml
  • Answer: 1150 ml

14. (2 marks)

  • Pail = 5 l
  • Tank = 3 × 5 = 15 l
  • Answer: 15 l

15. (2 marks)

  • Convert all to ml: 1 l 500 ml = 1500 ml; 2000 ml; 1 l = 1000 ml; 1500 ml
  • Order: 1000 ml, 1500 ml, 1500 ml, 2000 ml
  • Answer: 1 l, 1 l 500 ml (or 1500 ml), 1500 ml (or 1 l 500 ml), 2000 ml

Section D: Word Problems on Measurement (Questions 16–20)

16. (4 marks)

  • Cloth = 4 m = 400 cm
  • Cut into 8 equal pieces: 400 ÷ 8 = 50 cm
  • Answer: 50 cm

17. (4 marks)

  • (a) Ali = 32 kg, Brother = 25 kg
  • Total = 32 + 25 = 57 kg
  • (b) Father = 2 × 57 = 114 kg
  • Answer (a): 57 kg | Answer (b): 114 kg

18. (4 marks)

  • Container = 3 l 500 ml
  • Used = 1 l 750 ml
  • Left: 3 l 500 ml − 1 l 750 ml = 2 l 500 ml − 750 ml = 1 l 750 ml
  • Answer: 1 l 750 ml

19. (4 marks)

  • (a) Morning = 3 l 250 ml; Afternoon = 4 l 500 ml
  • Total used: 3 + 4 = 7 l; 250 + 500 = 750 ml = 7 l 750 ml
  • (b) Tank = 15 l = 15 l 0 ml
  • Left: 15 l 0 ml − 7 l 750 ml = 7 l 250 ml
  • Answer (a): 7 l 750 ml | Answer (b): 7 l 250 ml

20. (4 marks)

  • (a) Rope = 2 m 50 cm = 250 cm
  • Cut into 5 equal pieces: 250 ÷ 5 = 50 cm
  • (b) Each piece of rope = 50 cm; String = 30 cm
  • Total = 50 + 30 = 80 cm
  • Answer (a): 50 cm | Answer (b): 80 cm