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Primary 5 Mathematics Whole Numbers Quiz

Free P5 Maths Whole Numbers quiz, Nemo3 Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Questions

Primary 5 Mathematics Quiz - Whole Numbers

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

Duration: 45 minutes
Total Marks: 50

Instructions:

Answer all questions.
Show your working clearly in the space provided.
Write your answers in the spaces provided.
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 4 728 593, what is the value of the digit 7?
(1) 70 000
(2) 700 000
(3) 7 000 000
(4) 7 000
[____] [2]

2. Round 6 849 275 to the nearest ten thousand.
(1) 6 840 000
(2) 6 850 000
(3) 6 800 000
(4) 6 900 000
[____] [2]

3. Which of the following is equal to 3 000 000 + 400 000 + 50 000 + 6 000 + 700 + 80 + 9?
(1) 3 456 789
(2) 3 456 798
(3) 3 465 789
(4) 3 546 789
[____] [2]

4. Find the product of 4 528 and 300.
(1) 1 358 400
(2) 1 358 400
(3) 13 584 000
(4) 135 840
[____] [2]

5. What is the quotient when 8 736 000 is divided by 1 000?
(1) 8 736
(2) 87 360
(3) 873 600
(4) 87 360 000
[____] [2]

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 7 045 208 in words.
________________________________________________________________________ [2]

7. Arrange the following numbers from the smallest to the greatest.
5 829 407, 5 892 407, 5 289 407, 5 829 740
________________________________________________________________________ [2]

8. Find the value of 6 400 × 500.
________________________________________________________________________ [2]

9. Divide 9 876 000 by 2 000.
________________________________________________________________________ [2]

10. Estimate the value of 4 892 × 39 by rounding each number to the nearest ten.
________________________________________________________________________ [2]

11. Find the value of 7 200 ÷ 80.
________________________________________________________________________ [2]

12. A factory produced 2 450 toys each day for 25 days. How many toys did the factory produce in total?
________________________________________________________________________ [2]

13. There are 8 640 marbles to be packed equally into 120 boxes. How many marbles are there in each box?
________________________________________________________________________ [2]

14. Find the value of 45 + 18 × 3 − 24 ÷ 6.
________________________________________________________________________ [2]

15. Find the value of (3 600 + 2 400) ÷ (50 × 4).
________________________________________________________________________ [2]

Section C: Structured / Long Answer Questions (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 4 850 fiction books. It has 3 times as many non-fiction books as fiction books.
(a) How many non-fiction books are there in the library?
(b) How many books are there in the library altogether?

(a) ______________________________________________________________________ [2]
(b) ______________________________________________________________________ [2]

17. Mr Tan had $12 500. He bought a television set for$ 3 280 and a refrigerator for $2 450. He then divided the remaining money equally among his 3 children. How much money did each child receive?
________________________________________________________________________ [4]

18. A school has 1 240 students. Each student needs 8 exercise books for the year. The exercise books are sold in packs of 25. What is the least number of packs the school needs to buy?
________________________________________________________________________ [4]

19. The sum of two numbers is 8 500. The difference between the two numbers is 1 200. Find the larger number.
________________________________________________________________________ [4]

20. A container can hold 4 500 ml of water. A bottle can hold 750 ml of water.
(a) How many such bottles are needed to fill the container completely?
(b) If 3 such containers are filled with water, how many litres of water are there in total?

(a) ______________________________________________________________________ [2]
(b) ______________________________________________________________________ [2]

End of Quiz

Answers

Primary 5 Mathematics Quiz - Whole Numbers (Answer Key)

Total Marks: 50

Section A: Multiple Choice Questions (10 marks)

1. Answer: (2) 700 000 [2]
Working: The digit 7 is in the hundred thousands place.
Value = 7 × 100 000 = 700 000.
Common mistake: Confusing hundred thousands (700 000) with ten thousands (70 000) or millions (7 000 000).

2. Answer: (2) 6 850 000 [2]
Working: Look at the ten thousands digit (4) and the thousands digit (9). Since 9 ≥ 5, round up the ten thousands digit from 4 to 5.
6 849 275 → 6 850 000 (nearest ten thousand).
Common mistake: Rounding to the nearest thousand (6 849 000) or hundred thousand (6 800 000) instead.

3. Answer: (1) 3 456 789 [2]
Working: Add the place values:
3 000 000 + 400 000 = 3 400 000
3 400 000 + 50 000 = 3 450 000
3 450 000 + 6 000 = 3 456 000
3 456 000 + 700 = 3 456 700
3 456 700 + 80 = 3 456 780
3 456 780 + 9 = 3 456 789.

4. Answer: (1) 1 358 400 [2]
Working: 4 528 × 300 = 4 528 × 3 × 100 = 13 584 × 100 = 1 358 400.
Note: Options (1) and (2) are identical; either is accepted. The correct value is 1 358 400.

5. Answer: (1) 8 736 [2]
Working: Dividing by 1 000 moves the decimal point 3 places to the left.
8 736 000 ÷ 1 000 = 8 736.
Common mistake: Dividing by 100 (87 360) or multiplying by 1 000 (8 736 000 000).

Section B: Short Answer Questions (20 marks)

6. Answer: Seven million, forty-five thousand, two hundred and eight [2]
Working: Group digits in threes from right: 7 045 208.

7 → Seven million
045 → Forty-five thousand (zero in hundred thousands place is not read)
208 → Two hundred and eight
Marking: 1 mark for "Seven million", 1 mark for "forty-five thousand, two hundred and eight".
Common mistake: Writing "Seven million, four hundred and fifty thousand..." (misreading 045 as 450).

7. Answer: 5 289 407, 5 829 407, 5 829 740, 5 892 407 [2]
Working: Compare digit by digit from left (millions place):
All have 5 millions. Compare hundred thousands: 2 < 8. So 5 289 407 is smallest.
For the three numbers starting with 5 8... compare ten thousands: 2 < 9. So 5 829... < 5 892...
For the two 5 829... numbers, compare hundreds: 4 < 7. So 5 829 407 < 5 829 740.
Marking: 2 marks for fully correct order; 1 mark for 3 out of 4 correct.

8. Answer: 3 200 000 [2]
Working: 6 400 × 500 = 6 400 × 5 × 100 = 32 000 × 100 = 3 200 000.
Or: 64 × 5 = 320, then add 4 zeros (2 from 6400, 2 from 500) → 3 200 000.
Marking: 1 mark for correct method (e.g., 64 × 5 = 320), 1 mark for correct final answer with zeros.

9. Answer: 4 938 [2]
Working: 9 876 000 ÷ 2 000 = 9 876 000 ÷ 2 ÷ 1 000 = 4 938 000 ÷ 1 000 = 4 938.
Or: Cancel three zeros from both numbers → 9 876 ÷ 2 = 4 938.
Marking: 1 mark for correct simplification (cancelling zeros or dividing by 2 then 1000), 1 mark for correct answer.

10. Answer: 196 000 [2]
Working: Round 4 892 to nearest ten → 4 890. Round 39 to nearest ten → 40.
Estimated product = 4 890 × 40 = 4 890 × 4 × 10 = 19 560 × 10 = 195 600.
Alternative accepted: Some schools round 4 892 to 4 900 (nearest hundred) but question specifies "nearest ten".
4 890 × 40 = 195 600.
Marking: 1 mark for correct rounding of both numbers, 1 mark for correct multiplication.
Common mistake: Rounding 39 to 30 instead of 40.

11. Answer: 90 [2]
Working: 7 200 ÷ 80 = 720 ÷ 8 = 90. (Cancel one zero from both numbers).
Marking: 1 mark for correct simplification, 1 mark for correct answer.

12. Answer: 61 250 toys [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; Total = 61 250.
Marking: 1 mark for correct method (multiplication setup), 1 mark for correct answer with unit.

13. Answer: 72 marbles [2]
Working: 8 640 ÷ 120 = 864 ÷ 12 = 72. (Cancel one zero from both numbers).
Marking: 1 mark for correct division setup, 1 mark for correct answer with unit.

14. Answer: 95 [2]
Working: Order of operations (BODMAS): Multiplication and Division before Addition and Subtraction.
18 × 3 = 54
24 ÷ 6 = 4
45 + 54 − 4 = 99 − 4 = 95.
Marking: 1 mark for correct order (doing × and ÷ first), 1 mark for correct final answer.
Common mistake: Working left to right: 45 + 18 = 63, 63 × 3 = 189, 189 − 24 = 165, 165 ÷ 6 = 27.5 (incorrect).

15. Answer: 30 [2]
Working: Brackets first:
(3 600 + 2 400) = 6 000
(50 × 4) = 200
Then division: 6 000 ÷ 200 = 60 ÷ 2 = 30.
Marking: 1 mark for correct bracket evaluation, 1 mark for correct division and answer.

Section C: Structured / Long Answer Questions (20 marks)

16. (a) Answer: 14 550 non-fiction books [2]
Working: Non-fiction = 3 × Fiction = 3 × 4 850 = 14 550.
Marking: 1 mark for "3 × 4 850", 1 mark for correct answer.

(b) Answer: 19 400 books [2]
Working: Total = Fiction + Non-fiction = 4 850 + 14 550 = 19 400.
Or: Total = 4 × Fiction = 4 × 4 850 = 19 400.
Marking: 1 mark for correct method (addition or ×4), 1 mark for correct answer.
Follow-through: If (a) is wrong but (b) correctly uses (a)'s answer, award method mark for (b).

17. **Answer: $2 256.67** or **$ 2 256 remainder $2** [4] *Working:* Total spent =$ 3 280 + $2 450 =$ 5 730.
Remaining = $12 500 −$ 5 730 = $6 770. Each child =$ 6 770 ÷ 3 = $2 256 remainder$ 2.
In decimal: $2 256.66... ≈$ 2 256.67 (to nearest cent).
Marking:

1 mark for total spent ($5 730)
1 mark for remaining money ($6 770)
1 mark for division by 3
1 mark for correct final answer with unit ( $or cents) *Common mistake:* Forgetting to add both items before subtracting, or dividing$ 12 500 by 3 first.

18. Answer: 397 packs [4]
Working:
Total exercise books needed = 1 240 × 8 = 9 920.
Packs needed = 9 920 ÷ 25 = 396 remainder 20.
Since there is a remainder, need 1 more pack → 396 + 1 = 397 packs.
Marking:

1 mark for total books (9 920)
1 mark for division by 25 (396 r 20)
1 mark for recognising remainder requires extra pack
1 mark for final answer (397 packs)
Common mistake: Giving 396 packs (ignoring remainder) or rounding 396.8 to 396.

19. Answer: 4 850 [4]
Working:
Let larger number = L, smaller number = S.
L + S = 8 500
L − S = 1 200
Add the two equations: 2L = 9 700 → L = 4 850.
(Check: S = 8 500 − 4 850 = 3 650; Difference = 4 850 − 3 650 = 1 200 ✓)
Alternative method (model drawing):
Total = 8 500, Difference = 1 200.
2 units = 8 500 − 1 200 = 7 300 → 1 unit = 3 650 (smaller).
Larger = 3 650 + 1 200 = 4 850.
Marking:

1 mark for correct setup (equations or model concept)
1 mark for finding sum/difference of equations or 2 units
1 mark for dividing by 2 to find 1 unit
1 mark for correct final answer
Common mistake: Subtracting 1 200 from 8 500 and stopping at 7 300, or dividing 8 500 by 2 = 4 250.

20. (a) Answer: 6 bottles [2]
Working: Number of bottles = 4 500 ÷ 750 = 45 ÷ 7.5 = 6.
Or: 750 × 6 = 4 500.
Marking: 1 mark for division setup, 1 mark for correct answer.

(b) Answer: 13.5 litres [2]
Working:
3 containers = 3 × 4 500 ml = 13 500 ml.
Convert to litres: 13 500 ÷ 1 000 = 13.5 litres.
Marking: 1 mark for total ml (13 500), 1 mark for correct conversion to litres (13.5 ℓ).
Common mistake: Forgetting to convert ml to ℓ, or dividing by 100 instead of 1 000.

End of Answer Key

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