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Primary 4 Mathematics Semestral Assessment 1 (Mid-Year) Paper 3
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TUITIONGOWHERE PRIMARY SCHOOL (AI)
SA1 EXAMINATION 2026 (VERSION 3) - ANSWER KEY
PRIMARY 4 MATHEMATICS
Section A: Multiple Choice (20 marks)
1. Answer: (D) 5,000 The digit 5 is in the thousands place, so its value is 5 × 1,000 = 5,000.
2. Answer: (C) 24 Multiples of 4: 4, 8, 12, 16, 20, 24... Multiples of 6: 6, 12, 18, 24... 24 is a common multiple of both.
3. Answer: (C) 3 2/5 17/5 = 17 ÷ 5 = 3 remainder 2 = 3 2/5
4. Answer: (B) 0.45 45/100 = 0.45
5. Answer: (C) 52 cm Perimeter of square = 4 × side = 4 × 13 = 52 cm
6. Answer: (C) 68,000 67,549 rounded to nearest thousand: Look at hundreds digit (5), round up to 68,000.
7. Answer: (A) 1,541 9,246 ÷ 6 = 1,541
8. Answer: (D) 9/12 9/12 = 3/4, not 2/3. All others equal 2/3.
9. Answer: (A) 2.005, 2.05, 2.5 2.005 < 2.05 < 2.5
10. Answer: (B) 126 cm² Area = length × width = 14 × 9 = 126 cm²
11. Answer: (B) 15, 30, 45 LCM of 5 and 3 is 15. Common multiples: 15, 30, 45...
12. Answer: (B) 12 4 = 4 × 3/3 = 12/3, so there are 12 thirds.
13. Answer: (B) 39,746 5,678 × 7 = 39,746
14. Answer: (B) 38/9 4 2/9 = (4 × 9 + 2)/9 = (36 + 2)/9 = 38/9
15. Answer: (A) 1, 2, 3, 4, 6, 9, 12, 18, 36 All factors of 36.
16. Answer: (B) 3.8 3.78 rounded to nearest tenth: Look at hundredths (8), round up to 3.8.
17. Answer: (B) 1,200 8,400 ÷ 7 = 1,200
18. Answer: (A) 5/8 5/8 = 15/24, 7/12 = 14/24. Since 15/24 > 14/24, 5/8 is greater.
19. Answer: (B) 59,467 58,467 + 1,000 = 59,467
20. Answer: (C) 32 cm Area = 64 cm², so side = 8 cm. Perimeter = 4 × 8 = 32 cm.
Section B: Short Answer (40 marks)
21. Answer: 73,573
45,678
+ 27,895
--------
73,573
22. Answer: 12/12 = 1 5/12 + 7/12 = 12/12 = 1
23. Answer: 4.78
8.45
- 3.67
------
4.78
24. Answer: 58 cm Perimeter = 2 × (length + width) = 2 × (18 + 11) = 2 × 29 = 58 cm
25. Answer: 3 5/6 23/6 = 23 ÷ 6 = 3 remainder 5 = 3 5/6
26. Answer: 54,312
6,789
× 8
-------
54,312
27. Answer: 1,254 7,524 ÷ 6 = 1,254
28. Answer: 7/10 2/5 = 4/10 4/10 + 3/10 = 7/10
29. Answer: 6.85
12.80
- 5.95
-------
6.85
30. Answer: 192 cm² Area = length × width = 16 × 12 = 192 cm²
31. Answer: 9, 18, 27, 36, 45
32. Answer: 39/7 5 4/7 = (5 × 7 + 4)/7 = (35 + 4)/7 = 39/7
Section C: Word Problems (40 marks)
33. Answer: 12,395 beads
Working:
- Started with: 15,890 beads
- Used: -6,745 beads
- Bought: +3,250 beads
- Beads now = 15,890 - 6,745 + 3,250 = 12,395 beads
34. Answer: 25,704 bottles
Working: Bottles in 9 hours = 2,856 × 9 = 25,704 bottles
35. Answer: 1,071 eggs
Working: Eggs per carton = 8,568 ÷ 8 = 1,071 eggs
36. Answer: 5/8
Working: Fraction read = 3/8 + 2/8 = 5/8
37. Answer: 7.21 kg
Working: Total mass = 4.85 + 2.36 = 7.21 kg
38. Answer: 335 m²
Working:
- Area of pool = 25 × 15 = 375 m²
- Area of island = 8 × 5 = 40 m²
- Area of water = 375 - 40 = 335 m²
39. Answer: $1,496
Working:
- Savings per week = 876 = $374
- Savings in 4 weeks = 1,496
40. Answer: 5,022 mangoes
Working:
- Friday: 4,567 mangoes
- Saturday: 4,567 + 2,345 = 6,912 mangoes
- Sunday: 6,912 - 1,890 = 5,022 mangoes
~ End of Answer Key ~