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Primary 4 Mathematics Semestral Assessment 2 (End of Year) Paper 3

Free P4 Maths SA2 Paper 3, HY3 Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Questions

TuitionGoWhere Exam Practice (AI) — Mathematics Primary 4

School: TuitionGoWhere Exam Practice (AI) Subject: Mathematics Level: Primary 4 Paper: SA2 Practice Paper (Whole Numbers Focus) — Version 3 Duration: 60 minutes Total Marks: 40 Name: ___________________________ Class: ___________________________ Date: ___________________________

Instructions:

This paper contains 20 questions on Whole Numbers.
Section A: 10 short-answer questions (1 mark each).
Section B: 6 short-answer questions (2 marks each).
Section C: 4 problem-solving questions (2 or 3 marks each).
Show your working clearly where required.
Use the approximation symbol (≈) when rounding.

Section A (10 marks)

Answer each question. 1 mark each.

In the number 84,217, which digit is in the thousands place?
What does the digit 6 stand for in 56,309?
Write "sixty-two thousand and forty-eight" in numerals.
Round 37,842 to the nearest thousand.
Round 51,209 to the nearest hundred.
Find the value of 7,000 + 800 + 40 + 5.
List all the factors of 18.
Which of these is a multiple of 9: 47, 54, 61, 73?
A school has 3,124 students. Round this number to the nearest ten.
What is 4,000 × 6?

Section B (12 marks)

Show your working. 2 marks each.

Round 72,450 to the nearest hundred and to the nearest thousand. Write both answers.
Find the common factors of 20 and 28.
Multiply 3,418 by 5. Show your working.
Divide 8,436 by 4. Show your working.
Siti bought 12 packets of pencils. Each packet has 24 pencils. How many pencils did she buy?
A factory made 5,200 toys. They packed them equally into 8 boxes. How many toys were in each box?

Section C (18 marks)

Show full working. Marks stated per question.

Mr Tan arranged 6,245 books. He rounded the number to the nearest hundred and got a value. Then he rounded the original number to the nearest thousand. What are the two rounded values? (2 marks)
Mrs Lim wants to give stickers to her students in groups of 6, 9, or 12 with none left over. What is the least number of stickers she must have? Show how you find your answer. (3 marks)
A shop sold 2,345 red pens and 3,678 blue pens in January. In February, they sold 1,987 fewer pens than in January. How many pens did they sell in February? (3 marks)
Round 49,955 to the nearest ten, hundred, and thousand. Then explain which rounded value is largest and why. (4 marks)

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Answers

Answer Key — SA2 Practice Paper (Whole Numbers) Version 3

Total Marks: 40

Section A (10 marks)

4 (1 mark)
Teaching note: Place values from right: ones 7, tens 1, hundreds 2, thousands 4, ten thousands 8. The thousands digit is 4.
6,000 (1 mark)
Teaching note: Digit 6 is in the thousands place (56,309 → 6 thousands = 6,000). Common mistake: writing 600.
62,048 (1 mark)
Teaching note: Sixty-two thousand = 62,000; forty-eight = 48 → 62,048.
38,000 (1 mark)
Teaching note: 37,842 → hundreds digit is 8, next digit 4 (<5) so round up to 38,000.
51,200 (1 mark)
Teaching note: 51,209 → tens digit 0, next digit 9 (≥5) so round up hundreds to 51,200.
7,845 (1 mark)
Teaching note: Add by place value: 7,000+800=7,800; +40=7,840; +5=7,845.
1, 2, 3, 6, 9, 18 (1 mark)
Teaching note: Factors divide 18 exactly: 1×18, 2×9, 3×6.
54 (1 mark)
Teaching note: 54 ÷ 9 = 6, so 54 is a multiple of 9. Others not divisible by 9.
3,120 (1 mark)
Teaching note: 3,124 → tens digit 2, ones 4 (<5) → round down to 3,120.
24,000 (1 mark)
Teaching note: 4,000 × 6 = 24,000.

Section B (12 marks)

72,500 and 72,000 (2 marks: 1 for each)
Working: 72,450 → nearest hundred: tens=5 → round up → 72,500. Nearest thousand: hundreds=4 → round down → 72,000.
1, 2, 4 (2 marks: 1 for method, 1 for answer)
Working: Factors of 20: 1,2,4,5,10,20. Factors of 28: 1,2,4,7,14,28. Common: 1,2,4.
17,090 (2 marks: 1 working, 1 answer)
Working:
3,418 × 5 = (3,000×5)+(400×5)+(10×5)+(8×5) = 15,000+2,000+50+40 = 17,090.
2,109 (2 marks: 1 working, 1 answer)
Working: 8,436 ÷ 4: 8÷4=2, 4÷4=1, 3÷4=0 rem 3 → 36÷4=9 → 2,109.
288 (2 marks: 1 working, 1 answer)
Working: 12 × 24 = 288 pencils.
650 (2 marks: 1 working, 1 answer)
Working: 5,200 ÷ 8 = 650 toys per box.

Section C (18 marks)

6,200 and 6,000 (2 marks: 1 each)
Working: 6,245 → nearest hundred: tens=4 → round down → 6,200. Nearest thousand: hundreds=2 → round down → 6,000.
36 stickers (3 marks: 1 for listing multiples, 1 for identifying common, 1 for least)
Working: Multiples of 6: 6,12,18,24,30,36… Multiples of 9: 9,18,27,36… Multiples of 12: 12,24,36… LCM = 36. She needs at least 36 stickers.
4,036 pens (3 marks: 1 Jan total, 1 subtraction setup, 1 answer)
Working: Jan = 2,345 + 3,678 = 6,023. Feb = 6,023 − 1,987 = 4,036.
49,960; 50,000; 50,000 (4 marks: 1 each correct rounding, 1 for explanation)
Working:
- Nearest ten: ones=5 → 49,960
- Nearest hundred: tens=5 → 50,000
- Nearest thousand: hundreds=9 → 50,000
  Explanation: The hundred and thousand rounded values are equal (50,000) and both larger than the ten rounded value (49,960) because rounding to a larger place increases or keeps the value higher when the digits to the right are 5 or more.