Primary 5 Mathematics Whole Numbers Quiz

<!-- TuitionGoWhere generation metadata: stage=5-1; model=nvidia/nemotron-3-ultra-550b-a55b:free; model_label=NVIDIA Nemotron 3 Ultra 550B A55B Free; generated=2026-06-12; Sources: Stage 4-0 LLM templates, syllabus context, and Stage 2 evidence where available. -->

Primary 5 Mathematics Quiz - Whole Numbers

Name: ___________________________
Class: Primary 5 _______
Date: _______________
Score: _______ / 50

Duration: 45 minutes
Total Marks: 50

Instructions:

1. Answer all questions.
2. Show your working clearly in the space provided.
3. Write your answers in the spaces provided.
4. The number of marks is given in brackets [ ] at the end of each question or part question.

---

Section A: Multiple Choice Questions (10 marks)

Questions 1 to 5 carry 2 marks each. Choose the correct answer and write its number (1, 2, 3 or 4) in the brackets provided.

1. In the number 4 728 391, what is the value of the digit 7? [2]

(1) 70 000
(2) 700 000
(3) 7 000 000
(4) 7 000
Answer: (_____)

2. Round off 3 847 256 to the nearest ten thousand. [2]

(1) 3 840 000
(2) 3 850 000
(3) 3 800 000
(4) 3 900 000
Answer: (_____)

3. Which of the following is equal to 6 000 000 + 400 000 + 30 000 + 2 000 + 500 + 80 + 9? [2]

(1) 6 432 589
(2) 6 432 598
(3) 6 423 589
(4) 6 432 859
Answer: (_____)

4. Find the product of 4 250 and 300. [2]

(1) 1 275 000
(2) 1 275 00
(3) 127 500
(4) 12 750 000
Answer: (_____)

5. What is the quotient when 8 560 000 is divided by 400? [2]

(1) 21 400
(2) 214 000
(3) 2 140
(4) 21 400 000
Answer: (_____)

---

Section B: Short Answer Questions (20 marks)

Questions 6 to 15 carry 2 marks each. Show your working clearly and write your answers in the spaces provided.

6. Write 7 045 620 in words. [2]

---

7. Arrange the following numbers from the smallest to the greatest. [2]

5 820 400, 5 802 400, 5 280 400, 5 208 400

---

8. Find the value of 7 200 × 500. [2]

---

9. Divide 9 600 000 by 800. [2]

---

10. Estimate the value of 4 872 × 39 by rounding each number to the nearest ten. [2]

---

11. A factory produced 2 450 toys each day for 25 days. How many toys were produced in total? [2]

---

12. Find the value of 5 400 000 ÷ 60. [2]

---

13. What is the missing number in the box? [2]

6 300 000 = 6 000 000 + □ + 300 000

---

14. A number when rounded to the nearest thousand is 4 500 000. What is the greatest possible value of this number? [2]

---

15. Mr Tan had $8 500. He bought 15 identical chairs at$320 each. How much money had he left? [2]

---

---

Section C: Problem Sums (20 marks)

Questions 16 to 20 carry 4 marks each. Show your working clearly and write your answers in the spaces provided.

16. A library has 3 450 fiction books. It has 2 780 more non-fiction books than fiction books. How many books are there in the library altogether? [4]

---

---

---

Answer: _______________

17. A factory packed 4 800 bottles of juice into cartons. Each carton contained 24 bottles. The cartons were then loaded equally onto 8 trucks. How many cartons were on each truck? [4]

---

---

---

Answer: _______________

18. Mrs Lim bought 12 boxes of apples. There were 36 apples in each box. She gave 180 apples to her neighbours and packed the rest equally into bags of 6. How many bags of apples did she have? [4]

---

---

---

Answer: _______________

19. The sum of two numbers is 1 200 000. The larger number is 5 times the smaller number. What is the difference between the two numbers? [4]

---

---

---

Answer: _______________

20. A stadium has 45 rows of seats. Each row has 280 seats. During a concert, 5 600 seats were empty. How many seats were occupied? [4]

---

---

---

Answer: _______________

---

End of Quiz

<!-- TuitionGoWhere generation metadata: stage=5-1; model=nvidia/nemotron-3-ultra-550b-a55b:free; model_label=NVIDIA Nemotron 3 Ultra 550B A55B Free; generated=2026-06-12; Sources: Stage 4-0 LLM templates, syllabus context, and Stage 2 evidence where available. -->

Primary 5 Mathematics Quiz - Whole Numbers (Answer Key)

Total Marks: 50

---

Section A: Multiple Choice Questions (10 marks)

1. Answer: (2) 700 000 [2]

Explanation: In the number 4 728 391, the digit 7 is in the hundred thousands place. Its value is 7 × 100 000 = 700 000.

• Place values from right: ones, tens, hundreds, thousands, ten thousands, hundred thousands, millions.
• Common mistake: Confusing hundred thousands (700 000) with ten thousands (70 000) or millions (7 000 000).

2. Answer: (2) 3 850 000 [2]

Explanation: To round to the nearest ten thousand, look at the thousands digit (7 in 3 847 256). Since 7 ≥ 5, round up the ten thousands digit from 4 to 5. All digits to the right become zero.

• 3 847 256 → 3 850 000
• Common mistake: Rounding to the nearest hundred thousand (3 800 000) or million (4 000 000).

3. Answer: (1) 6 432 589 [2]

Explanation: Add the place values:

• 6 000 000 + 400 000 = 6 400 000
• 6 400 000 + 30 000 = 6 430 000
• 6 430 000 + 2 000 = 6 432 000
• 6 432 000 + 500 = 6 432 500
• 6 432 500 + 80 = 6 432 580
• 6 432 580 + 9 = 6 432 589

4. Answer: (1) 1 275 000 [2]

Explanation: 4 250 × 300 = 4 250 × 3 × 100 = 12 750 × 100 = 1 275 000.

• Multiply by 3 first: 4 250 × 3 = 12 750
• Then multiply by 100 (add two zeros): 1 275 000
• Common mistake: Forgetting zeros (127 500) or adding too many zeros (12 750 000).

5. Answer: (1) 21 400 [2]

Explanation: 8 560 000 ÷ 400 = 8 560 000 ÷ 4 ÷ 100 = 2 140 000 ÷ 100 = 21 400.

• Divide by 4 first: 8 560 000 ÷ 4 = 2 140 000
• Then divide by 100 (remove two zeros): 21 400
• Common mistake: Wrong number of zeros (214 000 or 2 140).

---

Section B: Short Answer Questions (20 marks)

6. Seven million, forty-five thousand, six hundred and twenty [2]

Explanation:

• 7 000 000 = Seven million
• 45 000 = Forty-five thousand (not four thousand five hundred)
• 620 = Six hundred and twenty
• Common mistake: Writing "four thousand five hundred" instead of "forty-five thousand" for 045 000.

7. 5 208 400, 5 280 400, 5 802 400, 5 820 400 [2]

Explanation: Compare digit by digit from the left (millions place):

• All have 5 millions.
• Compare hundred thousands: 2, 2, 8, 8 → 5 208 400 and 5 280 400 are smaller.
• For 5 208 400 vs 5 280 400: compare ten thousands (0 vs 8) → 5 208 400 is smaller.
• For 5 802 400 vs 5 820 400: compare ten thousands (0 vs 2) → 5 802 400 is smaller.

8. 3 600 000 [2]

Working: 7 200 × 500 = 7 200 × 5 × 100 = 36 000 × 100 = 3 600 000.

• 7 200 × 5 = 36 000
• 36 000 × 100 = 3 600 000

9. 12 000 [2]

Working: 9 600 000 ÷ 800 = 9 600 000 ÷ 8 ÷ 100 = 1 200 000 ÷ 100 = 12 000.

• 9 600 000 ÷ 8 = 1 200 000
• 1 200 000 ÷ 100 = 12 000

10. 195 000 [2]

Working:

• 4 872 rounded to nearest ten = 4 870
• 39 rounded to nearest ten = 40
• 4 870 × 40 = 4 870 × 4 × 10 = 19 480 × 10 = 194 800 ≈ 195 000 (or accept 194 800)
• Note: Estimation by rounding each to nearest ten gives 4 870 × 40 = 194 800.

11. 61 250 [2]

Working: 2 450 × 25 = 2 450 × 100 ÷ 4 = 245 000 ÷ 4 = 61 250.

• Or: 2 450 × 20 = 49 000; 2 450 × 5 = 12 250; 49 000 + 12 250 = 61 250.

12. 90 000 [2]

Working: 5 400 000 ÷ 60 = 5 400 000 ÷ 6 ÷ 10 = 900 000 ÷ 10 = 90 000.

• 5 400 000 ÷ 6 = 900 000
• 900 000 ÷ 10 = 90 000

13. 0 [2]

Explanation: 6 300 000 = 6 000 000 + 0 + 300 000. The ten thousands and thousands places are both 0.

• Place value breakdown: 6 300 000 = 6 000 000 + 300 000 + 0 + 0 + 0 + 0 + 0
• Common mistake: Writing 30 000 or 3 000 instead of 0.

14. 4 500 499 [2]

Explanation: When rounding to the nearest thousand, numbers from 4 499 500 to 4 500 499 round to 4 500 000. The greatest is 4 500 499.

• Halfway point: 4 500 000 - 500 = 4 499 500 (rounds up)
• Greatest that rounds down: 4 500 000 + 499 = 4 500 499
• 4 500 500 would round up to 4 501 000.

15. $3 700 [2]

Working:

• Cost of 15 chairs = 15 × $320 =$4 800
• Money left = $8 500 -$4 800 = $3 700
• 15 × 320 = 15 × 32 × 10 = 480 × 10 = 4 800

---

Section C: Problem Sums (20 marks)

16. 9 680 books [4]

Working:

• Non-fiction books = 3 450 + 2 780 = 6 230
• Total books = 3 450 + 6 230 = 9 680

Mark breakdown:

• 1 mark: Correct non-fiction books (6 230)
• 1 mark: Correct addition for total
• 1 mark: Correct final answer with unit
• 1 mark: Clear working shown

Common mistake: Adding 2 780 to fiction books twice, or finding only non-fiction books.

17. 25 cartons [4]

Working:

• Number of cartons = 4 800 ÷ 24 = 200
• Cartons per truck = 200 ÷ 8 = 25

Mark breakdown:

• 1 mark: Correct total cartons (200)
• 1 mark: Correct division by 8 trucks
• 1 mark: Correct final answer with unit
• 1 mark: Clear working shown

Alternative method: 4 800 ÷ (24 × 8) = 4 800 ÷ 192 = 25

18. 66 bags [4]

Working:

• Total apples = 12 × 36 = 432
• Apples left = 432 - 180 = 252
• Number of bags = 252 ÷ 6 = 42

Wait, let me recalculate: 12 × 36 = 432. 432 - 180 = 252. 252 ÷ 6 = 42 bags.

Correction: Answer is 42 bags, not 66.

Mark breakdown:

• 1 mark: Correct total apples (432)
• 1 mark: Correct apples left (252)
• 1 mark: Correct number of bags (42)
• 1 mark: Clear working shown

19. 800 000 [4]

Working:

• Let smaller number = x, larger number = 5x
• x + 5x = 1 200 000
• 6x = 1 200 000
• x = 200 000
• Larger number = 5 × 200 000 = 1 000 000
• Difference = 1 000 000 - 200 000 = 800 000

Mark breakdown:

• 1 mark: Correct equation setup (6x = 1 200 000)
• 1 mark: Correct smaller number (200 000)
• 1 mark: Correct difference (800 000)
• 1 mark: Clear working shown

Alternative: Difference = 4 parts out of 6 parts = 4/6 × 1 200 000 = 800 000

20. 7 000 seats [4]

Working:

• Total seats = 45 × 280 = 12 600
• Occupied seats = 12 600 - 5 600 = 7 000

Mark breakdown:

• 1 mark: Correct total seats (12 600)
• 1 mark: Correct subtraction for occupied seats
• 1 mark: Correct final answer with unit
• 1 mark: Clear working shown

Calculation check: 45 × 280 = 45 × 28 × 10 = (40 × 28 + 5 × 28) × 10 = (1 120 + 140) × 10 = 1 260 × 10 = 12 600.

---

End of Answer Key