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Primary 4 Mathematics Whole Numbers Quiz
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Questions
Primary 4 Mathematics Quiz - Whole Numbers
Name: ____________________________ Class: ______________ Date: ________________ Score: ____ / 30
Duration: 40 minutes
Total Marks: 30
Instructions:
- Answer all questions.
- Show your working clearly in the space provided.
- Write your final answer on the answer line where given.
- Calculators are not allowed.
Section A: Place Value and Number Sense (Questions 1–5)
Each question carries 1 mark. Write your answer in the space provided.
1. In the number 63,842, which digit is in the thousands place?
Answer: ____________________________
2. What does the digit 7 stand for in the number 57,309?
Answer: ____________________________
3. Write the number "eighty-two thousand, five hundred and six" in figures.
Answer: ____________________________
4. Arrange the following numbers in order from smallest to largest.
45,203 45,032 45,302 45,023
___________, ___________, ___________, ___________
5. What is the value of the digit 4 in the number 94,176?
Answer: ____________________________
Section B: Comparing, Ordering and Number Patterns (Questions 6–10)
Each question carries 1 mark. Write your answer in the space provided.
6. Use the symbols >, < or = to make the statement true.
62,450 ______ 62,540
7. Fill in the missing number in the pattern.
12,300 12,500 12,700 ___________ 13,100
Answer: ____________________________
8. What number is 1,000 more than 48,567?
Answer: ____________________________
9. What number is 10,000 less than 91,000?
Answer: ____________________________
10. Fill in the missing number in the pattern.
85,000 80,000 75,000 ___________ 65,000
Answer: ____________________________
Section C: Rounding Numbers (Questions 11–15)
Each question carries 2 marks. Show your working and write your answer in the space provided.
11. Round 29,456 to the nearest hundred.
Working:
Answer: ____________________________
12. Round 73,812 to the nearest thousand.
Working:
Answer: ____________________________
13. A school has 4,278 students. Round this number to the nearest hundred. Use the approximation symbol (≈) in your answer.
Working:
Answer: ____________________________
14. When a number is rounded to the nearest thousand, the result is 56,000. What is the smallest possible value of the original number?
Working:
Answer: ____________________________
15. When a number is rounded to the nearest hundred, the result is 38,400. What is the largest possible value of the original number?
Working:
Answer: ____________________________
Section D: Problem Solving with Whole Numbers (Questions 16–20)
Each question carries 3 marks. Show your working clearly.
16. The population of a town is 63,285. In the following year, the population increases by 4,500.
(a) What is the new population?
Working:
Answer (a): ____________________________
(b) Round the new population to the nearest thousand.
Working:
Answer (b): ____________________________
17. A factory produced 15,600 toys in January and 18,450 toys in February.
(a) How many toys did the factory produce in the two months altogether?
Working:
Answer (a): ____________________________
(b) Round your answer in (a) to the nearest thousand.
Working:
Answer (b): ____________________________
18. The table below shows the number of visitors to four museums in Singapore in a week.
| Museum | Number of Visitors |
|---|---|
| Science Centre | 12,450 |
| ArtScience Museum | 8,760 |
| National Museum | 15,230 |
| Asian Civilisations Museum | 9,580 |
(a) Which museum had the greatest number of visitors?
Answer (a): ____________________________
(b) Round the number of visitors at the Science Centre to the nearest thousand.
Working:
Answer (b): ____________________________
(c) How many more visitors did the National Museum have than the ArtScience Museum?
Working:
Answer (c): ____________________________
19. A number is made up of the following place value cards:
- 6 ten thousands
- 0 thousands
- 3 hundreds
- 8 tens
- 5 ones
(a) Write this number in figures.
Answer (a): ____________________________
(b) Round this number to the nearest thousand.
Working:
Answer (b): ____________________________
(c) What is the difference between the digit in the hundreds place and the digit in the tens place?
Working:
Answer (c): ____________________________
20. The distance from Singapore to Kuala Lumpur is about 350 km. The distance from Singapore to Bangkok is about 1,418 km.
(a) Round each distance to the nearest hundred kilometres.
Working:
Singapore to Kuala Lumpur ≈ ____________________________
Singapore to Bangkok ≈ ____________________________
(b) Estimate the total distance from Singapore to Kuala Lumpur and then to Bangkok by adding the rounded values.
Working:
Answer (b): ____________________________
(c) Find the actual total distance. Is your estimate in (b) reasonable? Explain briefly.
Working:
Answer (c): ____________________________
End of Quiz
Answers
Primary 4 Mathematics Quiz - Whole Numbers
Answer Key
Section A: Place Value and Number Sense (1 mark each)
1. In the number 63,842, which digit is in the thousands place?
Answer: 3
Explanation: The place values in 63,842 from left to right are: 6 (ten thousands), 3 (thousands), 8 (hundreds), 4 (tens), 2 (ones). The digit in the thousands place is 3.
2. What does the digit 7 stand for in the number 57,309?
Answer: 7,000
Explanation: In 57,309, the digit 7 is in the thousands place. Therefore, it stands for 7,000 (7 × 1,000).
Common mistake: Students may write just "7" instead of "7,000". Remind them that "stand for" asks for the value, not the digit itself.
3. Write the number "eighty-two thousand, five hundred and six" in figures.
Answer: 82,506
Explanation: Eighty-two thousand = 82,000; five hundred = 500; six = 6. Combined: 82,000 + 500 + 6 = 82,506.
Common mistake: Students may write 82,560 (confusing "six" with "sixty") or 82,056 (placing 5 in the wrong position). Remind them that "five hundred and six" means 5 hundreds, 0 tens, and 6 ones.
4. Arrange the following numbers in order from smallest to largest.
45,203 45,032 45,302 45,023
Answer: 45,023, 45,032, 45,203, 45,302
Explanation: All numbers start with 45, so compare the hundreds digit:
- 45,023 → 0 hundreds
- 45,032 → 0 hundreds (compare tens: 2 < 3, so 45,023 < 45,032)
- 45,203 → 2 hundreds
- 45,302 → 3 hundreds
Order: 45,023 < 45,032 < 45,203 < 45,302
5. What is the value of the digit 4 in the number 94,176?
Answer: 4,000
Explanation: In 94,176, the digit 4 is in the thousands place. Its value is 4 × 1,000 = 4,000.
Section B: Comparing, Ordering and Number Patterns (1 mark each)
6. Use the symbols >, < or = to make the statement true.
62,450 ______ 62,540
Answer: 62,450 < 62,540
Explanation: Both numbers have 6 ten thousands and 2 thousands. Compare the hundreds digit: 4 < 5. Therefore, 62,450 < 62,540.
7. Fill in the missing number in the pattern.
12,300 12,500 12,700 ___________ 13,100
Answer: 12,900
Explanation: The pattern increases by 200 each time. 12,300 + 200 = 12,500; 12,500 + 200 = 12,700; 12,700 + 200 = 12,900; 12,900 + 200 = 13,100 ✓
8. What number is 1,000 more than 48,567?
Answer: 49,567
Explanation: 48,567 + 1,000 = 49,567. Adding 1,000 increases the thousands digit by 1 (8 → 9).
9. What number is 10,000 less than 91,000?
Answer: 81,000
Explanation: 91,000 − 10,000 = 81,000. Subtracting 10,000 decreases the ten thousands digit by 1 (9 → 8).
10. Fill in the missing number in the pattern.
85,000 80,000 75,000 ___________ 65,000
Answer: 70,000
Explanation: The pattern decreases by 5,000 each time. 85,000 − 5,000 = 80,000; 80,000 − 5,000 = 75,000; 75,000 − 5,000 = 70,000; 70,000 − 5,000 = 65,000 ✓
Section C: Rounding Numbers (2 marks each)
11. Round 29,456 to the nearest hundred.
Working:
- The hundreds digit is 4 (29,456).
- Look at the digit to the right (tens digit): 5.
- Since 5 ≥ 5, round up: 4 becomes 5.
- Replace tens and ones digits with 0.
Answer: 29,500
Marking: 1 mark for correct method/identification of the deciding digit. 1 mark for correct answer.
12. Round 73,812 to the nearest thousand.
Working:
- The thousands digit is 3 (73,812 → thousands digit is 3, the digit to check is 8 in the hundreds place).
- Wait — let's identify carefully: 73,812 → 7 (ten thousands), 3 (thousands), 8 (hundreds), 1 (tens), 2 (ones).
- The thousands digit is 3. Look at the digit to the right (hundreds digit): 8.
- Since 8 ≥ 5, round up: 3 becomes 4.
- Replace hundreds, tens, and ones digits with 0.
Answer: 74,000
Marking: 1 mark for correct method/identification of the deciding digit. 1 mark for correct answer.
13. A school has 4,278 students. Round this number to the nearest hundred. Use the approximation symbol (≈) in your answer.
Working:
- 4,278 → hundreds digit is 2 (4,278).
- Look at the digit to the right (tens digit): 7.
- Since 7 ≥ 5, round up: 2 becomes 3.
- Replace tens and ones digits with 0.
Answer: 4,278 ≈ 4,300
Marking: 1 mark for correct rounding. 1 mark for correct use of ≈ symbol. Accept 4,300 alone for 1 mark if ≈ is missing.
14. When a number is rounded to the nearest thousand, the result is 56,000. What is the smallest possible value of the original number?
Working:
- When rounding to the nearest thousand, the deciding digit is the hundreds digit.
- For the result to round to 56,000, the original number must be at least 55,500 (since 55,500 rounds up to 56,000).
- Any number from 55,500 to 56,499 rounds to 56,000.
- The smallest possible value is 55,500.
Answer: 55,500
Marking: 1 mark for understanding the range concept. 1 mark for correct answer.
Common mistake: Students may write 55,000 or 55,499. Remind them that 55,499 rounds to 55,000 (hundreds digit 4 < 5), so the smallest number that rounds to 56,000 is 55,500.
15. When a number is rounded to the nearest hundred, the result is 38,400. What is the largest possible value of the original number?
Working:
- When rounding to the nearest hundred, the deciding digit is the tens digit.
- For the result to round to 38,400, the original number must be less than 38,450 (since 38,450 would round up to 38,500).
- Any number from 38,350 to 38,449 rounds to 38,400.
- The largest possible value is 38,449.
Answer: 38,449
Marking: 1 mark for understanding the range concept. 1 mark for correct answer.
Common mistake: Students may write 38,450 or 38,499. Remind them that 38,450 rounds to 38,500 (tens digit 5 ≥ 5, so round up).
Section D: Problem Solving with Whole Numbers (3 marks each)
16. The population of a town is 63,285. In the following year, the population increases by 4,500.
(a) What is the new population?
Working: 63,285 + 4,500 = 67,785
Answer (a): 67,785
(b) Round the new population to the nearest thousand.
Working:
- 67,785 → thousands digit is 7 (67,785).
- Look at the hundreds digit: 7.
- Since 7 ≥ 5, round up: 7 becomes 8.
Answer (b): 68,000
Marking: (a) 2 marks for correct addition. (b) 1 mark for correct rounding. Award partial credit (1 mark) if (a) is wrong but (b) correctly rounds the wrong answer.
17. A factory produced 15,600 toys in January and 18,450 toys in February.
(a) How many toys did the factory produce in the two months altogether?
Working: 15,600 + 18,450 = 34,050
Answer (a): 34,050
(b) Round your answer in (a) to the nearest thousand.
Working:
- 34,050 → thousands digit is 4 (34,050).
- Look at the hundreds digit: 0.
- Since 0 < 5, round down: 4 stays as 4.
Answer (b): 34,000
Marking: (a) 2 marks for correct addition. (b) 1 mark for correct rounding. Award partial credit if (a) is wrong but (b) correctly rounds the wrong answer.
18. Museum visitors table.
(a) Which museum had the greatest number of visitors?
Answer (a): National Museum (15,230)
Explanation: Comparing all four numbers: 15,230 > 12,450 > 9,580 > 8,760. The National Museum had the greatest number of visitors.
(b) Round the number of visitors at the Science Centre to the nearest thousand.
Working:
- 12,450 → thousands digit is 2 (12,450).
- Look at the hundreds digit: 4.
- Since 4 < 5, round down: 2 stays as 2.
Answer (b): 12,000
(c) How many more visitors did the National Museum have than the ArtScience Museum?
Working: 15,230 − 8,760 = 6,470
Answer (c): 6,470
Marking: (a) 1 mark. (b) 1 mark. (c) 1 mark for correct subtraction.
19. Place value cards: 6 ten thousands, 0 thousands, 3 hundreds, 8 tens, 5 ones.
(a) Write this number in figures.
Working:
- 6 ten thousands = 60,000
- 0 thousands = 0
- 3 hundreds = 300
- 8 tens = 80
- 5 ones = 5
- Total: 60,000 + 0 + 300 + 80 + 5 = 60,385
Answer (a): 60,385
(b) Round this number to the nearest thousand.
Working:
- 60,385 → thousands digit is 0 (60,385).
- Look at the hundreds digit: 3.
- Since 3 < 5, round down: 0 stays as 0.
Answer (b): 60,000
(c) What is the difference between the digit in the hundreds place and the digit in the tens place?
Working:
- In 60,385: hundreds digit = 3, tens digit = 8.
- Difference: 8 − 3 = 5
Answer (c): 5
Marking: (a) 1 mark. (b) 1 mark. (c) 1 mark.
20. Singapore to Kuala Lumpur ≈ 350 km. Singapore to Bangkok ≈ 1,418 km.
(a) Round each distance to the nearest hundred kilometres.
Working:
- 350 → tens digit is 5, so round up: 350 ≈ 400 km
- 1,418 → tens digit is 1, so round down: 1,418 ≈ 1,400 km
Answer:
- Singapore to Kuala Lumpur ≈ 400 km
- Singapore to Bangkok ≈ 1,400 km
(b) Estimate the total distance by adding the rounded values.
Working: 400 + 1,400 = 1,800 km
Answer (b): 1,800 km
(c) Find the actual total distance. Is your estimate in (b) reasonable? Explain briefly.
Working: 350 + 1,418 = 1,768 km
The estimate of 1,800 km is reasonable because it is close to the actual total of 1,768 km. The difference is only 1,800 − 1,768 = 32 km, which is small.
Answer (c): Actual total = 1,768 km. Yes, the estimate is reasonable because 1,800 is very close to 1,768 (difference of only 32 km).
Marking: (a) 1 mark (½ mark each). (b) 1 mark. (c) 1 mark — ½ mark for correct total, ½ mark for reasonable explanation.
Mark Summary
| Section | Questions | Marks per Question | Total Marks |
|---|---|---|---|
| A | 1–5 | 1 | 5 |
| B | 6–10 | 1 | 5 |
| C | 11–15 | 2 | 10 |
| D | 16–20 | 3 | 10 |
| Total | 20 | 30 |
This quiz was generated as practice content aligned to the Primary 4 Mathematics syllabus (Whole Numbers). It is not derived from any specific past-year examination paper.