Primary 3 Mathematics Practice Paper 2

TuitionGoWhere Practice Paper — Answer Key

Mathematics Primary 3 | Whole Numbers | Version 2 of 5

Section A: Multiple Choice (10 marks)

1. What is the value of the digit 6 in 4 638?

• The digit 6 is in the hundreds place.
• Value of 6 = 6 × 100 = 600.
• Answer: (C) 600 ✅ (1 mark)

Common mistake: Choosing (A) 6 — this is the digit itself, not its value. The question asks for the value of the digit.

2. Which number is the smallest?

• All numbers start with 3 (thousands place is the same).
• Compare the hundreds digit: 1 < 2 < 4.
• Between (B) 3 124 and (D) 3 142, both have hundreds digit 1.
• Compare the tens digit: 2 < 4, so 3 124 < 3 142.
• Answer: (B) 3 124 ✅ (1 mark)

3. 7 000 + 300 + 50 + 2 = ________

• 7 000 + 300 = 7 300
• 7 300 + 50 = 7 350
• 7 350 + 2 = 7 352
• Answer: (A) 7 352 ✅ (1 mark)

4. Round 4 567 to the nearest hundred.

• The hundreds digit is 5; the tens digit is 6.
• Since 6 ≥ 5, round up: 4 500 → 4 600.
• Answer: (C) 4 600 ✅ (1 mark)

Common mistake: Choosing (A) 4 500 — forgetting to check the tens digit for rounding up.

5. Which digit is in the thousands place in the number 8 903?

• Place values from left to right: 8 (thousands), 9 (hundreds), 0 (tens), 3 (ones).
• Answer: (C) 8 ✅ (1 mark)

6. Arrange in ascending order: 5 672, 5 276, 5 762, 5 627

• All start with 5 (thousands). Compare hundreds: 2 < 6 < 7.
• 5 276 is smallest. Among 5 672 and 5 627 (both have hundreds digit 6): compare tens → 2 < 7, so 5 627 < 5 672.
• Order: 5 276, 5 627, 5 672, 5 762.
• Answer: (A) 5 276, 5 627, 5 672, 5 762 ✅ (1 mark)

7. What is 3 456 rounded to the nearest ten?

• The tens digit is 5; the ones digit is 6.
• Since 6 ≥ 5, round up: 3 450 → 3 460.
• Answer: (C) 3 460 ✅ (1 mark)

8. In the number 2 845, the digit 8 is in the ________ place.

• From left: 2 (thousands), 8 (hundreds), 4 (tens), 5 (ones).
• Answer: (C) hundreds ✅ (1 mark)

9. Which of the following is an even number?

• An even number ends in 0, 2, 4, 6, or 8.
• (A) 3 571 → ends in 1 (odd)
• (B) 4 238 → ends in 8 (even) ✅
• (C) 5 003 → ends in 3 (odd)
• (D) 6 117 → ends in 7 (odd)
• Answer: (B) 4 238 ✅ (1 mark)

10. "Six thousand and forty-three" in numerals.

• Six thousand = 6 000
• Forty-three = 43
• 6 000 + 43 = 6 043
• Answer: (C) 6 043 ✅ (1 mark)

Common mistake: Choosing (D) 6 403 — confusing "forty-three" (43) with "four hundred and three" (403).

Section B: Short Answer (20 marks)

11. Write 5 809 in words.

• 5 000 = five thousand
• 800 = eight hundred
• 9 = nine
• Answer: five thousand, eight hundred and nine ✅ (2 marks)

Marking: Award 2 marks for the correct answer. Award 1 mark if the student writes "five thousand eight hundred nine" (missing "and" — minor).

12. Value of each digit in 6 374.

(2 marks: ½ mark each)

13. Fill in the missing numbers in the pattern.

• 2 450 − 2 350 = 100
• 2 550 − 2 450 = 100
• The pattern increases by 100 each time.
• 2 550 + 100 = 2 650
• 2 650 + 100 = 2 750
• Answer: 2 650, 2 750 ✅ (2 marks: 1 mark each)

14. Use digits 3, 7, 1, 9 (each used once).

(a) Largest possible 4-digit number: arrange digits in descending order → 9 731 ✅

(b) Smallest possible 4-digit number: arrange digits in ascending order → 1 379 ✅

(2 marks: 1 mark each)

15. Round to the nearest hundred.

(a) 3 284: tens digit is 8 (≥ 5), so round up → 3 300 ✅

(b) 7 550: tens digit is 5 (≥ 5), so round up → 7 600 ✅

(c) 1 099: tens digit is 9 (≥ 5), so round up → 1 100 ✅

(3 marks: 1 mark each)

Common mistake for (c): Writing 1 000 — forgetting that 1 099 rounds up to 1 100.

16. School library books.

Working:

  4 328
+ 3 765
-------
  8 093

• 8 + 5 = 13, write 3, carry 1
• 2 + 6 + 1 = 9
• 3 + 7 = 10, write 0, carry 1
• 4 + 3 + 1 = 8

Answer: 8 093 books ✅

(3 marks: 1 mark for correct working setup, 1 mark for correct addition process, 1 mark for correct final answer)

17. Descending order: 4 102, 4 012, 4 201, 4 120

• All start with 4 (thousands). Compare hundreds: 2 > 1 > 0.
• 4 201 is largest. Between 4 102 and 4 120 (both have hundreds digit 1): compare tens → 2 > 0, so 4 120 > 4 102.
• Answer: 4 201, 4 120, 4 102, 4 012 ✅

(2 marks: award 2 marks for fully correct order; 1 mark if only 2–3 numbers are in the correct position)

18. Chicken rice packets: January = 2 350, February = 1 875.

Working:

  2 350
- 1 875
-------
    475

• Ones: 0 − 5 → borrow, 10 − 5 = 5
• Tens: 4 (after borrow) − 7 → borrow, 14 − 7 = 7
• Hundreds: 2 (after borrow) − 8 → borrow, 12 − 8 = 4
• Thousands: 1 (after borrow) − 1 = 0

Answer: 475 packets ✅

(3 marks: 1 mark for correct working setup, 1 mark for correct subtraction process with borrowing, 1 mark for correct final answer)

Section C: Extended Response (10 marks)

19. Charity drive donations.

(a) Lowest to highest:

• Compare hundreds digit: 3A and 3D have 4; 3C has 6; 3B has 8.
• Between 3A (2 468) and 3D (2 486): compare tens → 6 < 8, so 2 468 < 2 486.
• Order: 3A (2 468), 3D (2 486), 3C (2 648), 3B (2 846).
• Answer: 3A, 3D, 3C, 3B ✅ (2 marks)

(b) Class 3B target: $3 000.

• Working: 3 000 − 2 846 = 154

  3 000
- 2 846
-------
    154

• Answer: $154 ✅ (2 marks: 1 mark for correct working, 1 mark for correct answer)

(c) Difference between highest (3B: 2 846) and lowest (3A: 2 468).

• Working: 2 846 − 2 468 = 378

  2 846
- 2 468
-------
    378

• Answer: $378 ✅ (1 mark)

20. HDB town populations.

(a) Smallest population:

• All have 8 thousands. Compare hundreds: 3 < 4 < 5.
• Town A has hundreds digit 3, which is smallest.
• Answer: Town A ✅ (1 mark)

(b) Round to nearest hundred:

• Town A: 8 345 → tens digit 4 (< 5), round down → 8 300 ✅
• Town B: 8 543 → tens digit 4 (< 5), round down → 8 500 ✅
• Town C: 8 435 → tens digit 3 (< 5), round down → 8 400 ✅
• Town D: 8 453 → tens digit 5 (≥ 5), round up → 8 500 ✅

(2 marks: ½ mark each)

(c) Towns with the same rounded population:

• Town B → 8 500 and Town D → 8 500
• Answer: Town B and Town D ✅ (1 mark)

(d) Explanation:

• Sample answer: "I compared the thousands place first. All four towns had 8 thousands, so I then compared the hundreds place. Town A had 3 hundreds, which was the smallest among 3, 4, and 5. So Town A has the smallest population." ✅

(1 mark: Award 1 mark for a clear explanation that mentions comparing place values from left to right, starting with the largest place value.)

Marking note: Accept any equivalent explanation that demonstrates understanding of comparing place values systematically.

End of Answer Key

Total: 40 marks