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Primary 4 Mathematics Whole Numbers Quiz
Free Exam-Derived Owl Alpha Primary 4 Mathematics Whole Numbers quiz with questions and answers for Singapore students. This page is rendered as a direct URL so the questions and answers can be discovered without pressing in-page buttons.
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Questions
Primary 4 Mathematics Quiz - Whole Numbers
Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: ________ / 40
Duration: 40 minutes
Total Marks: 40
Instructions:
- Answer ALL questions.
- Show your working clearly in the space provided.
- Write your answers in the blanks where given.
- Calculators are NOT allowed.
Section A: Place Value and Number Recognition (Questions 1–5)
Each question carries 2 marks.
1. In the number 63,825, which digit is in the thousands place?
2. What does the digit 7 stand for in 47,306?
3. Write the following in numerals: Eighty-two thousand, five hundred and nine.
4. Write the following in words: 91,043.
5. Arrange the following numbers in order, starting with the smallest.
52,140 51,987 52,301 51,402
Section B: Rounding Numbers (Questions 6–10)
Each question carries 2 marks.
6. Round 38,467 to the nearest hundred.
7. Round 72,581 to the nearest thousand.
8. A number rounded to the nearest ten is 45,620. Write down the smallest possible value of the number.
9. A number rounded to the nearest hundred is 63,400. Write down the greatest possible value of the number.
10. Use the approximation symbol ≈ to complete the following.
27,538 ≈ ________________ (rounded to the nearest thousand)
Section C: Number Patterns and Sequences (Questions 11–15)
Each question carries 2 marks.
11. Fill in the missing number in the pattern below.
12,350 12,550 12,750 ____________
12. Fill in the missing number in the pattern below.
85,000 80,000 75,000 ____________
13. What is the 6th number in this pattern?
4,200 4,500 4,800 5,100 …
14. Fill in the missing number.
30,000 30,050 ____________ 30,150 30,200
15. The first number in a pattern is 15,000. Each number after that increases by 2,000. What is the 5th number in the pattern?
Section D: Comparing, Ordering and Problem Solving (Questions 16–20)
Questions 16–18 carry 2 marks each. Questions 19–20 carry 3 marks each.
16. Use the symbols >, < or = to compare the following numbers.
64,205 ________________ 64,025
17. Fill in the blank with the correct digit to make the statement true.
5_,318 > 56,318
The missing digit can be _______________________________________________
18. Tom wrote down a 5-digit number. The digit in the ten thousands place is 4. The digit in the hundreds place is 7. The digit in the ones place is 3. The other two digits are both 0. What number did Tom write?
19. The population of a town is 49,752. In the following year, the population increases by approximately 5,000.
(a) Round the population 49,752 to the nearest thousand. (1 mark)
(b) Estimate the new population after the increase. Show your working. (2 marks)
20. A shop sold 28,450 books in January, 28,999 books in February and 27,503 books in March.
(a) Arrange the number of books sold in order, starting with the greatest. (1 mark)
(b) How many books did the shop sell in all three months? Show your working. (2 marks)
End of Quiz
Answers
Primary 4 Mathematics Quiz - Whole Numbers
Answer Key
Section A: Place Value and Number Recognition
1. 3
- Working: In 63,825, the places from left to right are: 6 (ten thousands), 3 (thousands), 8 (hundreds), 2 (tens), 5 (ones). The digit in the thousands place is 3.
- Marking: 2 marks for correct answer. 1 mark if student identifies the position correctly but writes the wrong digit.
2. 7,000
- Working: In 47,306, the digit 7 is in the thousands place. So 7 stands for 7,000.
- Marking: 2 marks for correct answer. Accept "7 thousand" or "7000".
3. 82,509
- Working: Eighty-two thousand = 82,000; five hundred = 500; nine = 9. Combined: 82,000 + 500 + 9 = 82,509.
- Marking: 2 marks for correct answer. Common mistake: writing 82,590 or 82,059.
4. Ninety-one thousand and forty-three
- Working: 91,043 → 91,000 (ninety-one thousand) + 43 (forty-three) = "Ninety-one thousand and forty-three."
- Marking: 2 marks for correct answer. Accept "Ninety-one thousand, forty-three." Common mistake: writing "Ninety-one thousand and four-three" or omitting "and."
5. 51,402, 51,987, 52,140, 52,301
- Working: Compare digit by digit from the left. All numbers start with 5 in the ten thousands place. In the thousands place: 1, 1, 2, 2. So 51,402 and 51,987 come first. Comparing hundreds: 4 < 9, so 51,402 < 51,987. Then 52,140 and 52,301: hundreds place 1 < 3, so 52,140 < 52,301.
- Marking: 2 marks for fully correct order. 1 mark if at least two numbers are in the correct relative position.
Section B: Rounding Numbers
6. 38,500
- Working: To round 38,467 to the nearest hundred, look at the tens digit (6). Since 6 ≥ 5, round up the hundreds digit from 4 to 5. Replace tens and ones with 0. Answer: 38,500.
- Marking: 2 marks for correct answer. Common mistake: 38,470 (rounding to nearest ten instead).
7. 73,000
- Working: To round 72,581 to the nearest thousand, look at the hundreds digit (5). Since 5 ≥ 5, round up the thousands digit from 2 to 3. Replace hundreds, tens and ones with 0. Answer: 73,000.
- Marking: 2 marks for correct answer. Common mistake: 72,000 (not rounding up when digit is 5).
8. 45,615
- Working: If a number rounded to the nearest ten is 45,620, the original number must be between 45,615 and 45,624 (inclusive of 45,615, exclusive of 45,625). The smallest possible value is 45,615.
- Marking: 2 marks for correct answer. Common mistake: 45,621 or 45,610.
9. 63,449
- Working: If a number rounded to the nearest hundred is 63,400, the original number must be between 63,400 and 63,449 (since 63,450 would round to 63,500). The greatest possible value is 63,449.
- Marking: 2 marks for correct answer. Common mistake: 63,450 or 63,499.
10. 27,538 ≈ 28,000
- Working: To round 27,538 to the nearest thousand, look at the hundreds digit (5). Since 5 ≥ 5, round up the thousands digit from 7 to 8. Answer: 28,000.
- Marking: 2 marks for correct answer with ≈ symbol used. Common mistake: 27,000 (not rounding up).
Section C: Number Patterns and Sequences
11. 12,950
- Working: The pattern increases by 200 each time. 12,350 + 200 = 12,550; 12,550 + 200 = 12,750; 12,750 + 200 = 12,950.
- Marking: 2 marks for correct answer. 1 mark if student identifies the pattern (+200) but makes an arithmetic error.
12. 70,000
- Working: 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.
- Marking: 2 marks for correct answer.
13. 5,700
- Working: The pattern increases by 300 each time. 1st: 4,200; 2nd: 4,500; 3rd: 4,800; 4th: 5,100; 5th: 5,400; 6th: 5,700.
- Marking: 2 marks for correct answer. 1 mark if student identifies the pattern (+300) but makes an arithmetic error.
14. 30,100
- Working: The pattern increases by 50 each time. 30,000 + 50 = 30,050; 30,050 + 50 = 30,100; 30,100 + 50 = 30,150; 30,150 + 50 = 30,200.
- Marking: 2 marks for correct answer.
15. 23,000
- Working: 1st: 15,000; 2nd: 17,000; 3rd: 19,000; 4th: 21,000; 5th: 23,000. (Add 2,000 each time.)
- Marking: 2 marks for correct answer. 1 mark if student identifies the pattern but makes an arithmetic error.
Section D: Comparing, Ordering and Problem Solving
16. 64,205 > 64,025
- Working: Compare digit by digit from the left. Both have 6 (ten thousands) and 4 (thousands). In the hundreds place: 2 > 0. So 64,205 > 64,025.
- Marking: 2 marks for correct symbol.
17. 7, 8 or 9
- Working: For 5_,318 > 56,318, the missing digit in the thousands place must be greater than 6. So the digit can be 7, 8, or 9.
- Marking: 2 marks for all three correct digits. 1 mark if only one or two correct digits are given.
18. 40,703
- Working: Ten thousands place = 4; thousands place = 0; hundreds place = 7; tens place = 0; ones place = 3. The number is 40,703.
- Marking: 2 marks for correct answer. Common mistake: 47,003 (confusing hundreds with thousands).
19. (a) 50,000 | (b) 55,000
- Working for (a): To round 49,752 to the nearest thousand, look at the hundreds digit (7). Since 7 ≥ 5, round up: 49,752 → 50,000.
- Working for (b): Estimated new population = 50,000 + 5,000 = 55,000.
- Marking: 1 mark for (a), 2 marks for (b) — 1 mark for correct working, 1 mark for correct final answer.
20. (a) 28,999, 28,450, 27,503 | (b) 84,952 books
- Working for (a): Comparing the three numbers: 28,999 > 28,450 > 27,503.
- Working for (b): 28,450 + 28,999 + 27,503 = 57,449 + 27,503 = 84,952.
- Marking: 1 mark for (a) correct order. 2 marks for (b) — 1 mark for correct addition working, 1 mark for correct final answer. Common mistake: misalignment of place values in addition.
Total: 40 marks