Primary 3 Mathematics Weighted Assessment 3 (Term 3) Paper 1

TUITIONGOWHERE PRIMARY SCHOOL (AI)

WEIGHTED ASSESSMENT 3 EXAMINATION 2026 - ANSWER KEY

PRIMARY 3 MATHEMATICS

Section A: Multiple Choice Questions (15 marks)

1. Which angle is larger than a right angle but smaller than a straight angle? (1 mark) Answer: 2. Obtuse angle An obtuse angle is between 90° and 180°

2. What is 8 × 9? (1 mark) Answer: 1. 72 8 × 9 = 72

3. What is 7 × 8? (1 mark) Answer: 2. 56 7 × 8 = 56

4. 144 ÷ 12 = ? (1 mark) Answer: 1. 12 144 ÷ 12 = 12

5. What is 9 × 6? (1 mark) Answer: 1. 54 9 × 6 = 54

6. Which fraction is NOT equivalent to 1/3? (1 mark) Answer: 4. 2/5 1/3 = 2/6 = 3/9 = 4/12, but 2/5 ≠ 1/3

7. What is 5/8 - 2/8? (1 mark) Answer: 1. 3/8 Subtract numerators: 5 - 2 = 3. Keep denominator: 3/8

8. A clock shows 3:45. What type of angle is formed between the hour and minute hands? (1 mark) Answer: 1. Acute angle At 3:45, the minute hand is at 9 and the hour hand is between 3 and 4. The angle between them is less than 90°

9. In a pictogram, if star = 6 children, how many children do 3 stars represent? (1 mark) Answer: 2. 18 3 × 6 = 18 children

10. What is the perimeter of a square with side 13 cm? (1 mark) Answer: 3. 52 cm Perimeter = 4 × side = 4 × 13 = 52 cm

11. Which statement about angles is TRUE? (1 mark) Answer: 2. A right angle is exactly 90° A right angle is exactly 90°. Acute < 90°, Obtuse > 90°, Straight = 180°

12. What is 15.6 + 8.75? (1 mark) Answer: 1. 24.35 15.60 + 8.75 = 24.35

13. The area of a rectangle is 48 cm². If its length is 8 cm, what is its breadth? (1 mark) Answer: 1. 6 cm Breadth = Area ÷ Length = 48 ÷ 8 = 6 cm

14. In a class survey about favorite fruits, 8 chose apples, 5 chose oranges, and 7 chose bananas. How many students were surveyed? (1 mark) Answer: 2. 20 8 + 5 + 7 = 20 students

15. What is 6 × 7? (1 mark) Answer: 1. 42 6 × 7 = 42

Section B: Short Answer Questions (20 marks)

16. Complete the times tables: (4 marks)

a) 4 × 9 = 36 (1 mark)

b) 3 × 8 = 24 (1 mark)

c) 6 × 7 = 42 (1 mark)

d) 5 × 9 = 45 (1 mark)

17. Identify these angles: (4 marks)

a) An angle that measures exactly 90°: Right angle (1 mark)

b) An angle that measures 45°: Acute angle (1 mark)

c) An angle that measures 120°: Obtuse angle (1 mark)

d) An angle that measures 180°: Straight angle (1 mark)

18. Work out these calculations: (4 marks)

a) 3/7 + 2/7 = 5/7 (1 mark) Add numerators: 3 + 2 = 5. Keep denominator: 5/7

b) 6/9 - 2/9 = 4/9 (1 mark) Subtract numerators: 6 - 2 = 4. Keep denominator: 4/9

c) Express 4/12 in simplest form = 1/3 (1 mark) Divide both by 4: 4÷4 = 1, 12÷4 = 3

d) Express 6/8 in simplest form = 3/4 (1 mark) Divide both by 2: 6÷2 = 3, 8÷2 = 4

19. Complete this table for measuring angles: (4 marks)

(1 mark for each correct answer)

20. Convert these measurements: (4 marks)

a) $18.50 +$9.75 = $28.25 (1 mark)

b) $25.00 -$12.85 = $12.15 (1 mark)

c) 2 m 65 cm = 265 cm (1 mark) 2 m = 200 cm. Total: 200 + 65 = 265 cm

d) 1 hour 45 minutes = 105 minutes (1 mark) 1 hour = 60 minutes. Total: 60 + 45 = 105 minutes

Section C: Word Problems (15 marks)

21. Sarah is learning about angles. She measures angles around her classroom and finds: (3 marks)

• The corner of her desk: 90°
• The opening of her textbook: 45°
• Her opened scissors: 130°

Name the type of each angle.

Desk corner: Right angle (1 mark) 90° is a right angle

Textbook: Acute angle (1 mark) 45° is less than 90°, so it is an acute angle

Scissors: Obtuse angle (1 mark) 130° is greater than 90° but less than 180°, so it is an obtuse angle

22. A bakery displays cupcakes in rows. Each row has 8 cupcakes. If there are 7 complete rows plus 3 extra cupcakes, how many cupcakes are there in total? (4 marks)

Working: Number of cupcakes in complete rows = 7 × 8 = 56 cupcakes (2 marks) Total cupcakes = 56 + 3 = 59 cupcakes (1 mark)

Answer: 59 cupcakes (1 mark)

23. Mei Lin collected data about pets owned by students in her class. She found: (4 marks)

• Dogs: 12 students
• Cats: 8 students
• Fish: 5 students
• No pets: 7 students

How many students are in Mei Lin's class in total?

Working: Total = 12 + 8 + 5 + 7 = 32 students (2 marks)

Bar chart: (1 mark for correct labels, 1 mark for correct heights)

• Dogs bar should reach 12
• Cats bar should reach 8
• Fish bar should reach 5
• No pets bar should reach 7

Answer: 32 students

24. Ahmad has 3/4 of a chocolate bar. He gives 2/4 of the chocolate bar to his sister. What fraction of the chocolate bar does he have left? (4 marks)

Working: Chocolate Ahmad has = 3/4 (1 mark) Chocolate given away = 2/4 (1 mark) Chocolate left = 3/4 - 2/4 = 1/4 (1 mark)

Answer: 1/4 of the chocolate bar (1 mark)

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 (WA3):

• Angles: Classification (acute, right, obtuse, straight), angle measurement
• Times Tables: Complete mastery of 2-10 tables
• Fractions: Addition, subtraction, equivalence, simplest form
• Time: Duration calculations, time conversions
• Measurement: Length, money conversions
• Geometry: Perimeter, area, angle sums in shapes
• Data: Pictographs, bar charts, data interpretation
• Problem Solving: Multi-step word problems