Primary 3 Mathematics Whole Numbers Quiz

Primary 3 Mathematics Quiz - Whole Numbers

Answer Key

Section A: Place Value (Questions 1–5)

1. In the number 4,738, which digit is in the hundreds place?
Answer: 7
Marks: 2
Working: In 4,738, the places from left to right are: thousands (4), hundreds (7), tens (3), ones (8). The digit in the hundreds place is 7.
Marking note: Award 2 marks for correct answer. Award 0 marks for any other answer.

2. What is the value of the digit 6 in 6,205?
Answer: 6,000
Marks: 2
Working: The digit 6 is in the thousands place in 6,205. Value of 6 = 6 × 1,000 = 6,000.
Marking note: Award 2 marks for 6,000. Award 0 marks for just "6" — students must give the value, not just the digit.

3. Write the number "three thousand, five hundred and twelve" in numerals.
Answer: 3,512
Marks: 2
Working: Three thousand = 3,000; five hundred = 500; twelve = 12. So 3,000 + 500 + 10 + 2 = 3,512.
Marking note: Award 2 marks for 3,512. Common mistake: writing 3,5012 or 3512 without comma — accept 3512.

4. The HDB block number is 3,849. What is the value of the digit 8 in this number?
Answer: 800
Marks: 2
Working: In 3,849, the digit 8 is in the hundreds place. Value of 8 = 8 × 100 = 800.
Marking note: Award 2 marks for 800. Award 0 marks for just "8".

5. Fill in the missing number: 5,000 + _____ + 30 + 7 = 5,437
Answer: 400
Marks: 2
Working: 5,437 = 5,000 + 400 + 30 + 7. The missing number is 400 (the hundreds place).
Marking note: Award 2 marks for 400. Award 1 mark if student shows correct place value reasoning but makes an arithmetic error.

Section B: Comparing and Ordering Numbers (Questions 6–10)

6. Which number is larger: 4,562 or 4,652?
Answer: 4,652
Marks: 2
Working: Both numbers have 4 thousands. Compare hundreds: 5 hundreds vs 6 hundreds. Since 6 > 5, 4,652 is larger.
Marking note: Award 2 marks for correct answer with or without working.

7. Arrange the following numbers in ascending order: 3,245 | 3,425 | 3,142 | 3,524
Answer: 3,142, 3,245, 3,425, 3,524
Marks: 2
Working: All numbers have 3 thousands. Compare hundreds: 1 < 2 < 4 < 5. So the order is 3,142 → 3,245 → 3,425 → 3,524.
Marking note: Award 2 marks for all four in correct order. Award 1 mark if 2–3 numbers are in correct position.

8. What is the smallest 4-digit number you can make using the digits 7, 2, 9, and 4 (each digit used once)?
Answer: 2,479
Marks: 2
Working: To make the smallest number, place the smallest digit in the highest place value. Smallest digit is 2 (thousands), then 4 (hundreds), then 7 (tens), then 9 (ones). Answer: 2,479.
Marking note: Award 2 marks for 2,479. Common mistake: 9,742 (largest, not smallest).

9. Put the correct symbol: 5,308 ⬜ 5,038
Answer: >
Marks: 2
Working: Both have 5 thousands. Compare hundreds: 3 hundreds vs 0 hundreds. Since 3 > 0, 5,308 > 5,038.
Marking note: Award 2 marks for >. Award 0 marks for < or =.

10. A school library has 2,876 English books and 2,768 Chinese books. Which type of book is there more of? How many more?
Answer: English books, 108 more
Marks: 2
Working: Compare: 2,876 > 2,768, so there are more English books. Difference: 2,876 − 2,768 = 108.
Marking note: Award 2 marks for "English books, 108 more". Award 1 mark if only the correct type is named without the difference, or if the difference is correct but the type is not named.

Section C: Number Patterns and Sequences (Questions 11–15)

11. Fill in the missing numbers: 2,350, 2,450, 2,550, _____, _____
Answer: 2,650, 2,750
Marks: 2
Working: The pattern increases by 100 each time. 2,550 + 100 = 2,650; 2,650 + 100 = 2,750.
Marking note: Award 2 marks for both correct. Award 1 mark if only one is correct.

12. Fill in the missing numbers: 9,000, 8,500, 8,000, _____, _____
Answer: 7,500, 7,000
Marks: 2
Working: The pattern decreases by 500 each time. 8,000 − 500 = 7,500; 7,500 − 500 = 7,000.
Marking note: Award 2 marks for both correct. Award 1 mark if only one is correct.

13. What is the next number? 1,100, 1,200, 1,300, 1,400, _____
Answer: 1,500
Marks: 2
Working: The pattern increases by 100 each time. 1,400 + 100 = 1,500.
Marking note: Award 2 marks for 1,500.

14. Fill in the missing number: 4,200, 4,150, 4,100, _____, 4,000
Answer: 4,050
Marks: 2
Working: The pattern decreases by 50 each time. 4,100 − 50 = 4,050. Check: 4,050 − 50 = 4,000 ✓
Marking note: Award 2 marks for 4,050.

15. Tom counted in steps of 250 starting from 1,000. Write the next three numbers.
1,000, 1,250, 1,500, _____, _____, _____
Answer: 1,750, 2,000, 2,250
Marks: 2
Working: Add 250 each time. 1,500 + 250 = 1,750; 1,750 + 250 = 2,000; 2,000 + 250 = 2,250.
Marking note: Award 2 marks for all three correct. Award 1 mark if one or two are correct.

Section D: Rounding Numbers (Questions 16–18)

16. Round 3,467 to the nearest hundred.
Answer: 3,500
Marks: 2
Working: Look at the tens digit: 6. Since 6 ≥ 5, round up the hundreds digit. 3,467 → 3,500.
Marking note: Award 2 marks for 3,500. Common mistake: 3,400 (student rounds down instead of up).

17. Round 7,825 to the nearest ten.
Answer: 7,830
Marks: 2
Working: Look at the ones digit: 5. Since 5 ≥ 5, round up the tens digit. 7,825 → 7,830.
Marking note: Award 2 marks for 7,830. Common mistake: 7,820 (student rounds down).

18. A shop sold 2,348 bottles of water in January. Round this number to the nearest hundred.
Answer: 2,300
Marks: 2
Working: Look at the tens digit: 4. Since 4 < 5, round down (keep the hundreds digit the same). 2,348 → 2,300.
Marking note: Award 2 marks for 2,300. Common mistake: 2,400 (student rounds up incorrectly).

Section E: Word Problems (Questions 19–20)

19. During a school fundraising event, Class 3A collected $2,456 and Class 3B collected$3,128.

(a) What is the total amount collected by both classes?
Answer: $5,584
Marks: 2 (part a)
Working: 2,456 + 3,128 = 5,584.

  2,456
+ 3,128
-------
  5,584

Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct working but wrong final answer due to arithmetic error.

(b) How much more did Class 3B collect than Class 3A?
Answer: $672
Marks: 3 (part b)
Working: 3,128 − 2,456 = 672.

  3,128
- 2,456
-------
    672

Marking note: Award 3 marks for correct answer with clear working. Award 2 marks for correct method with minor arithmetic error. Award 1 mark for attempting subtraction but with significant errors.

20. A factory produced 4,500 toys in Week 1, 3,800 toys in Week 2, and 5,200 toys in Week 3.

(a) Arrange the weekly production from highest to lowest.
Answer: Week 3 (5,200), Week 1 (4,500), Week 2 (3,800)
Marks: 2 (part a)
Working: Compare: 5,200 > 4,500 > 3,800. So Week 3 > Week 1 > Week 2.
Marking note: Award 2 marks for all three in correct order with week numbers. Award 1 mark if numbers are correct but week labels are missing or wrong.

(b) How many toys were produced altogether in the three weeks?
Answer: 13,500
Marks: 2 (part b)
Working: 4,500 + 3,800 + 5,200 = 13,500.

  4,500
  3,800
+ 5,200
-------
 13,500

Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct working but wrong final answer.

(c) How many more toys were produced in Week 3 than in Week 2?
Answer: 1,400
Marks: 1 (part c)
Working: 5,200 − 3,800 = 1,400.
Marking note: Award 1 mark for correct answer.

Total: 40 marks

Note: This quiz was generated using syllabus-aligned LLM-inferred templates. It complements but does not replicate past-year exam papers.