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Primary 3 Mathematics Weighted Assessment 2 (Term 3) Paper 1
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TUITIONGOWHERE PRIMARY SCHOOL (AI)
WEIGHTED ASSESSMENT 2 EXAMINATION 2026 - ANSWER KEY
PRIMARY 3 MATHEMATICS
Section A: Multiple Choice Questions (15 marks)
1. What is 3/8 + 1/8? (1 mark) Answer: 1. 4/8 Add numerators: 3 + 1 = 4. Keep denominator: 4/8
2. Which fraction is NOT equivalent to 1/2? (1 mark) Answer: 4. 3/5 1/2 = 2/4 = 3/6 = 4/8, but 3/5 ≠ 1/2
3. What is 2/5 of 15? (1 mark) Answer: 2. 6 2/5 × 15 = (2 × 15) ÷ 5 = 30 ÷ 5 = 6
4. How many minutes are there from 2:45 p.m. to 3:15 p.m.? (1 mark) Answer: 1. 30 minutes From 2:45 to 3:00 is 15 minutes, from 3:00 to 3:15 is 15 minutes. Total: 30 minutes
5. What is the area of a rectangle with length 9 cm and breadth 4 cm? (1 mark) Answer: 3. 36 cm² Area = length × breadth = 9 × 4 = 36 cm²
6. Ahmad uses 250 ml of milk. How much milk is left from a 1-litre bottle? (1 mark) Answer: 1. 750 ml 1 litre = 1000 ml. Left = 1000 - 250 = 750 ml
7. Which angle is greater than 90°? (1 mark) Answer: 3. Obtuse angle Obtuse angles are greater than 90°. Acute < 90°, Right = 90°
8. How many faces does a triangular prism have? (1 mark) Answer: 2. 5 2 triangular faces + 3 rectangular faces = 5 faces
9. What is the mode of this data: 5, 7, 5, 8, 5, 6? (1 mark) Answer: 1. 5 5 appears 3 times, more than any other number
10. In a bar graph, the bar for 'Cats' reaches 12. If each unit represents 3 animals, how many cats are there? (1 mark) Answer: 3. 36 12 × 3 = 36 cats
11. What comes next in this pattern: 45, 50, 55, 60, ? (1 mark) Answer: 2. 65 Pattern increases by 5 each time: 60 + 5 = 65
12. Mei Ling has 3.50. How much does she have left? (1 mark) *Answer: 1. 8.75 - 5.25
13. Which fraction is the largest? (1 mark) Answer: 4. 1/2 1/2 = 0.5, 1/3 ≈ 0.33, 1/4 = 0.25, 1/5 = 0.2
14. A square has a perimeter of 20 cm. What is the length of each side? (1 mark) Answer: 2. 5 cm Perimeter = 4 × side, so 20 = 4 × side, side = 5 cm
15. What is 72 ÷ 8? (1 mark) Answer: 2. 9 72 ÷ 8 = 9
Section B: Short Answer Questions (20 marks)
16. Calculate these fractions: (4 marks)
a) 5/7 + 1/7 = 6/7 (2 marks) Add numerators: 5 + 1 = 6. Keep denominator: 6/7
b) 7/9 - 3/9 = 4/9 (2 marks) Subtract numerators: 7 - 3 = 4. Keep denominator: 4/9
17. Express these fractions in their simplest form: (4 marks)
a) 6/8 = 3/4 (2 marks) Divide both numerator and denominator by 2: 6÷2 = 3, 8÷2 = 4
b) 10/15 = 2/3 (2 marks) Divide both numerator and denominator by 5: 10÷5 = 2, 15÷5 = 3
18. Convert these measurements: (4 marks)
a) 2 m 65 cm = 265 cm (2 marks) 2 m = 2 × 100 = 200 cm. Total: 200 + 65 = 265 cm
b) 3 litres 450 ml = 3450 ml (2 marks) 3 litres = 3 × 1000 = 3000 ml. Total: 3000 + 450 = 3450 ml
19. Complete these time calculations: (4 marks)
a) 1 hour 25 minutes + 45 minutes = 2 hours 10 minutes (2 marks) 25 + 45 = 70 minutes = 1 hour 10 minutes. Total: 1 + 1 = 2 hours 10 minutes
b) 3 hours 20 minutes - 1 hour 35 minutes = 1 hour 45 minutes (2 marks) 3 hours 20 minutes = 2 hours 80 minutes. 2 hours 80 minutes - 1 hour 35 minutes = 1 hour 45 minutes
20. Find the perimeter and area: (4 marks)
Rectangle: Length = 12 cm, Breadth = 7 cm
Perimeter = 38 cm (2 marks) Perimeter = 2 × (length + breadth) = 2 × (12 + 7) = 2 × 19 = 38 cm
Area = 84 cm² (2 marks) Area = length × breadth = 12 × 7 = 84 cm²
Section C: Word Problems (15 marks)
21. Siti bought 3/4 kg of apples and 1/4 kg of oranges. What is the total weight of fruits she bought? (3 marks)
Working: Total weight = 3/4 + 1/4 = 4/4 = 1 kg (2 marks)
Answer: 1 kg (1 mark)
22. A tank holds 8 litres of water. If 2 litres 750 ml is used, how much water is left in the tank? (4 marks)
Working: Tank capacity = 8 litres = 8000 ml (1 mark) Water used = 2 litres 750 ml = 2750 ml (1 mark) Water left = 8000 - 2750 = 5250 ml = 5 litres 250 ml (2 marks)
Answer: 5 litres 250 ml
23. Raj starts reading at 7:25 p.m. He reads for 1 hour 40 minutes. What time does he finish reading? (4 marks)
Working: Start time: 7:25 p.m. (1 mark) Add 1 hour: 8:25 p.m. (1 mark) Add 40 minutes: 8:25 + 40 minutes = 9:05 p.m. (2 marks)
Answer: 9:05 p.m.
24. A rectangular garden is 15 m long and 8 m wide. What is its area? If grass costs $2 per square metre, how much will it cost to cover the whole garden with grass? (4 marks)
Working: Area = length × breadth = 15 × 8 = 120 m² (2 marks) Cost = 120 × 240 (2 marks)
Answer: Area = 120 m², Cost = $240
Total: 50 marks
Marking Scheme Summary:
- Section A (MCQ): 15 marks (1 mark each)
- Section B (Short Answer): 20 marks
- Section C (Word Problems): 15 marks
- Total: 50 marks
Grade Boundaries:
- 45-50: Excellent
- 38-44: Very Good
- 30-37: Good
- 25-29: Satisfactory
- Below 25: Needs Improvement
Key Topics Covered (WA2):
- Fractions: Addition, subtraction, equivalence, simplest form
- Time: Duration calculations, time addition/subtraction
- Measurement: Length, volume, mass conversions
- Geometry: Perimeter, area, angles, 3D shapes
- Data: Mode, bar graphs, pictographs
- Problem Solving: Multi-step word problems