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Primary 4 Mathematics Semestral Assessment 1 (Mid-Year) Paper 4

Free P4 Maths SA1 Paper 4, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 4 Mathematics From Real Exams Generated by Claude Sonnet 4 Updated 2026-08-17

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TUITIONGOWHERE PRIMARY SCHOOL (AI)

SA1 EXAMINATION 2026 (VERSION 4) - ANSWER KEY

PRIMARY 4 MATHEMATICS


Section A: Multiple Choice (20 marks)

1. Answer: (B) 4 In 49,657, the digit 4 is in the ten thousands place.

2. Answer: (C) 12 Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36 GCF = 12

3. Answer: (B) 35/8 4 3/8 = (4 × 8 + 3)/8 = (32 + 3)/8 = 35/8

4. Answer: (C) 2/25 0.08 = 8/100 = 2/25 (simplified)

5. Answer: (B) 121 cm² Area = side × side = 11 × 11 = 121 cm²

6. Answer: (B) 84,600 84,567 → Look at tens (6), round up to 84,600.

7. Answer: (B) 872 7,848 ÷ 9 = 872

8. Answer: (B) 15/18 5/6 = 15/18 (multiply by 3/3)

9. Answer: (A) 0.76, 0.67, 0.607 0.76 > 0.67 > 0.607

10. Answer: (A) 10 cm Perimeter = 2(length + width) 56 = 2(18 + width) 28 = 18 + width Width = 10 cm

11. Answer: (A) 18 LCM of 6 and 9 is 18.

12. Answer: (C) 28 3 1/2 = 7/2 = 28/8, so 28 eighths.

13. Answer: (A) 24,534 4,089 × 6 = 24,534

14. Answer: (B) 4 3/7 31/7 = 31 ÷ 7 = 4 remainder 3 = 4 3/7

15. Answer: (C) 10 Factors of 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 (10 factors)

16. Answer: (B) 6.05 6.049 rounded to nearest hundredth: Look at thousandths (9), round up to 6.05.

17. Answer: (B) 1,827 9,135 ÷ 5 = 1,827

18. Answer: (A) 7/9 7/9 = 14/18, 5/6 = 15/18. Since 14/18 < 15/18, 7/9 is smaller.

19. Answer: (A) 65,342 75,342 - 10,000 = 65,342

20. Answer: (B) 8 cm Area = length × width 96 = 12 × width Width = 8 cm


Section B: Short Answer (40 marks)

21. Answer: 38,167

  67,845
- 29,678
--------
  38,167

22. Answer: 11/15 7/15 + 4/15 = 11/15

23. Answer: 24.38

  15.60
+  8.78
-------
  24.38

24. Answer: 17 cm Perimeter = 4 × side 68 = 4 × side Side = 17 cm

25. Answer: 4 5/9 41/9 = 41 ÷ 9 = 4 remainder 5 = 4 5/9

26. Answer: 59,969

  8,567
×     7
-------
 59,969

27. Answer: 819 6,552 ÷ 8 = 819

28. Answer: 5/9 1/3 = 3/9 3/9 + 2/9 = 5/9

29. Answer: 6.75

 20.40
-13.65
------
  6.75

30. Answer: 74 cm Perimeter = 2 × (length + width) = 2 × (23 + 14) = 2 × 37 = 74 cm

31. Answer: 1, 2, 3, 6, 9, 18, 27, 54 54 = 1 × 54 = 2 × 27 = 3 × 18 = 6 × 9

32. Answer: 61/8 7 5/8 = (7 × 8 + 5)/8 = (56 + 5)/8 = 61/8


Section C: Word Problems (40 marks)

33. Answer: 19,881 items

Working:

  • Started with: 23,456 items
  • Received: +8,765 items
  • Shipped: -12,340 items
  • Items left = 23,456 + 8,765 - 12,340 = 19,881 items

34. Answer: 15,000 pages

Working: Pages in 8 hours = 1,875 × 8 = 15,000 pages

35. Answer: 816 pencils

Working: Pencils per class = 7,344 ÷ 9 = 816 pencils

36. Answer: 5/7

Working: Fraction eaten = 2/7 + 3/7 = 5/7

37. Answer: 9.73 kg

Working: Total mass = 6.25 + 3.48 = 9.73 kg

38. Answer: 1,152 m²

Working:

  • Area of field = 45 × 28 = 1,260 m²
  • Area of shed = 12 × 9 = 108 m²
  • Area not covered = 1,260 - 108 = 1,152 m²

39. Answer: $10,590

Working:

  • Spending per month = 2,4502,450 - 685 = $1,765
  • Spending in 6 months = 1,765×6=1,765 × 6 = 10,590

40. Answer: 2,789 cupcakes

Working:

  • Monday: 3,678 cupcakes
  • Tuesday: 3,678 + 1,456 = 5,134 cupcakes
  • Wednesday: 5,134 - 2,345 = 2,789 cupcakes

~ End of Answer Key ~