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Primary 6 PSLE Mathematics Multiplication Division Quiz
Free P6 PSLE Maths Multiplication Division quiz, LongCat Exam version, with questions, answers, and PSLE-focused practice for Singapore students.
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Primary 6 PSLE Mathematics Quiz - Multiplication Division
Answer Key
Section A: Short Answer (1 mark each)
1. 48 × 25 = 1,200
Working: 48 × 25 = 48 × (100 ÷ 4) = 4,800 ÷ 4 = 1,200
2. 672 ÷ 8 = 84
Working: 672 ÷ 8 = (640 + 32) ÷ 8 = 80 + 4 = 84
3. 305 × 46 = 14,030
Working:
305
× 46
-----
1830 (305 × 6)
12200 (305 × 40)
-----
14030
4. 1,248 × 35 = 43,680 toys
Working:
1248
× 35
-----
6240 (1,248 × 5)
37440 (1,248 × 30)
-----
43680
5. 9,000 ÷ 12 = 750
Working: 9,000 ÷ 12 = (9,000 ÷ 6) ÷ 2 = 1,500 ÷ 2 = 750
6. 1,001 × 78 = 78,078
Working: 1,001 × 78 = (1,000 × 78) + (1 × 78) = 78,000 + 78 = 78,078
7. Boxes: 41 Leftover: 16
Working: 1,000 ÷ 24 = 41 remainder 16 24 × 41 = 984; 1,000 − 984 = 16
8. 156 × 101 = 15,756
Working: 156 × 101 = (156 × 100) + (156 × 1) = 15,600 + 156 = 15,756
9. 90 × 36 = 3,240
Working: 3,240 ÷ 36 = 3,240 ÷ 6 ÷ 6 = 540 ÷ 6 = 90
10. 450 ÷ 18 = 25 chairs
Working: 450 ÷ 18 = 450 ÷ 9 ÷ 2 = 50 ÷ 2 = 25
Section B: Structured Questions (2 marks each)
11.
(a) 360 ÷ 15 = 24 bags
(b) 24 × 96**
Marking: 1 mark for (a), 1 mark for (b). Award follow-through mark for (b) if (a) is wrong but method is correct.
12. 2,500 × 36 = 90,000
Working:
2500
× 36
-----
15000 (2,500 × 6)
75000 (2,500 × 30)
-----
90000
Alternative: 2,500 × 36 = 25 × 36 × 100 = 900 × 100 = 90,000
Marking: 1 mark for correct method, 1 mark for correct answer.
13. 480 × 1.75 = 840 pages (or 480 × 7/4 = 840)
Working: 1 hour 45 minutes = 1.75 hours = 7/4 hours 480 × 7 ÷ 4 = 3,360 ÷ 4 = 840
Alternative: 480 × 1 = 480; 480 × 3/4 = 360; 480 + 360 = 840
Marking: 1 mark for converting time correctly, 1 mark for final answer.
14. 999 × 45 = 44,955
Working: 999 × 45 = (1,000 − 1) × 45 = 45,000 − 45 = 44,955
Marking: 1 mark for correct method using (1000 − 1), 1 mark for correct answer.
15.
(a) 2,016 ÷ 24 = 84 mangoes per crate
Working: 2,016 ÷ 24 = (2,016 ÷ 8) ÷ 3 = 252 ÷ 3 = 84
(b) 84 × 2,940**
Working: 84 × 35 = (84 × 30) + (84 × 5) = 2,520 + 420 = 2,940
Marking: 1 mark for (a), 1 mark for (b). Follow-through allowed for (b).
Section C: Problem Sums (3 marks each)
16.
(a) 25 × 48 = 1,200 chairs
Working: 25 × 48 = 25 × 4 × 12 = 100 × 12 = 1,200
(b) 1,200 < 1,350, so there are not enough chairs. 1,350 − 1,200 = 150 more chairs needed.
Marking: 1 mark for (a) correct answer. 1 mark for comparison/statement. 1 mark for correct number of additional chairs.
17.
(a) 1,650 × 8 = 13,200 bottles
Working: 1,650 × 8 = (1,600 × 8) + (50 × 8) = 12,800 + 400 = 13,200
(b) 13,200 ÷ 24 = 550 full cartons, remainder 0 bottles
Working: 13,200 ÷ 24 = (13,200 ÷ 12) ÷ 2 = 1,100 ÷ 2 = 550
Marking: 1 mark for (a). 1 mark for correct division. 1 mark for correct number of cartons and remainder.
18.
(a) 35 × 128 = 4,480 markers
Working:
128
× 35
-----
640 (128 × 5)
3840 (128 × 30)
-----
4480
(b) 35 × 840**
Working: 35 × 24 = (35 × 20) + (35 × 4) = 700 + 140 = 840
Marking: 1 mark for (a) correct answer. 1 mark for (b) correct answer. 1 mark for clear working in either part.
19.
(a) 5,400 ÷ 180 = 30 hours
Working: 5,400 ÷ 180 = 5,400 ÷ 18 ÷ 10 = 300 ÷ 10 = 30
(b) 8:30 a.m. + 30 hours = 2:30 p.m. the next day
Working: 8:30 a.m. + 24 hours = 8:30 a.m. (next day); 8:30 a.m. + 6 hours = 2:30 p.m.
Marking: 1 mark for (a). 1 mark for correct addition of time. 1 mark for correct final time with day indication.
20.
(a) 250 × 18 = 4,500 biscuits
Working: 250 × 18 = 250 × (20 − 2) = 5,000 − 500 = 4,500
(b) 4,500 ÷ 12 = 375 full bags
Working: 4,500 ÷ 12 = (4,500 ÷ 6) ÷ 2 = 750 ÷ 2 = 375
(c) 375 × 1,875**
Marking: 1 mark for (a). 1 mark for (b). 1 mark for (c). Follow-through allowed for (c) from (b).
Summary of Marks
| Section | Questions | Marks per Question | Total Marks |
|---|---|---|---|
| A | 1–10 | 1 | 10 |
| B | 11–15 | 2 | 10 |
| C | 16–20 | 3 | 15 |
| Total | 20 questions | — | 35 |
Note: Total marks = 35. The quiz is scored out of 40 to allow for partial credit and method marks in problem sums.
Common Mistakes to Watch For
- Q1, Q12: Forgetting to add zeros when multiplying by multiples of 10.
- Q7: Confusing quotient and remainder in division with remainders.
- Q13: Not converting 1 hour 45 minutes correctly to hours (1.75 or 7/4).
- Q14: Not using the (1,000 − 1) shortcut, leading to long multiplication errors.
- Q19: Errors in adding hours across midnight; students should break into 24-hour chunks.
- Q20: Forgetting that only full bags are counted in part (b).