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Primary 3 Mathematics Semestral Assessment 2 (End of Year) Paper 5

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Questions

TuitionGoWhere Exam Practice (AI)

TuitionGoWhere Secondary School (AI)


Subject:	Mathematics
Level:	Primary 3
Paper:	SA2 Practice Paper - Whole Numbers
Duration:	45 minutes
Total Marks:	50 marks
Version:	5 of 5

Name: _________________________________ Class: _______ Date: _______

INSTRUCTIONS

Write your name, class, and date in the spaces provided.
This paper consists of Section A and Section B.
Answer all questions.
For questions in Section A, write your answers in the spaces provided.
For questions in Section B, show your working clearly in the spaces provided.
Marks are allocated for correct method even if the final answer is wrong.

SECTION A: Multiple-Choice Questions (20 marks)

Answer all questions. Each question carries 2 marks.

1. In the number 8,426, which digit is in the hundreds place?


(1)	8
(2)	4
(3)	2
(4)	6

Answer: _______

2. What is the value of the digit 7 in the number 7,903?


(1)	7
(2)	70
(3)	700
(4)	7,000

Answer: _______

3. Which of the following numbers is the largest?


(1)	4,208
(2)	4,280
(3)	4,028
(4)	4,802

Answer: _______

4. 5 thousands, 17 tens and 9 ones is the same as


(1)	5,179
(2)	5,269
(3)	5,719
(4)	6,179

Answer: _______

5. Which number is 100 more than 6,859?


(1)	6,759
(2)	6,869
(3)	6,959
(4)	6,959

Answer: _______

6. Round 4,567 to the nearest hundred.


(1)	4,500
(2)	4,560
(3)	4,570
(4)	4,600

Answer: _______

7. What is the missing number in this pattern? 2,450, 2,550, 2,650, ______, 2,850


(1)	2,700
(2)	2,750
(3)	2,800
(4)	2,850

Answer: _______

8. Arrange the numbers 3,209, 3,902, 3,029, 3,290 in ascending order. Which number is second?


(1)	3,029
(2)	3,209
(3)	3,290
(4)	3,902

Answer: _______

9. 6,000 + ______ + 30 + 7 = 6,937. What is the missing number?


(1)	90
(2)	900
(3)	9,000
(4)	90,000

Answer: _______

10. Which of the following is an odd number between 5,800 and 5,900?


(1)	5,802
(2)	5,878
(3)	5,889
(4)	5,900

Answer: _______

End of Section A

SECTION B: Short-Answer Questions (20 marks)

Answer all questions. Show your working clearly. Each question carries 2 marks.

11. Write 5,060 in words.

12. What is 2,000 less than 8,432?

13. Arrange these numbers in descending order: 7,105, 7,501, 7,015, 7,510

14. Find the sum of 3,456 and 2,978.

15. Subtract 1,289 from 5,000.

16. What is the greatest 4-digit number that can be formed using the digits 5, 2, 8, and 1? Each digit can be used only once.

17. Round 3,249 to the nearest ten.

18. Complete the number pattern: 4,100, 4,300, 4,500, ______, ______

19. In the number 9,909, what is the difference between the values of the two 9s that are underlined?

(Note: The two 9s are the first digit and the third digit)

20. A number when rounded to the nearest hundred becomes 7,500. What is the smallest possible number?

End of Section B

SECTION C: Word Problems (10 marks)

Answer all questions. Show your working clearly in the space provided.

21. Mrs. Tan had 4,500 stickers. She gave 1,289 stickers to Class 3A and 1,567 stickers to Class 3B. How many stickers did she have left?

Working:

Answer: _______________ stickers [3 marks]

22. A factory produced 2,345 toys on Monday. It produced 1,876 toys on Tuesday and 2,089 toys on Wednesday.

(a) How many toys did the factory produce altogether on Monday and Tuesday? [1 mark]

Working:

Answer: _______________ toys

(b) How many more toys were produced on Wednesday than on Tuesday? [2 marks]

Working:

Answer: _______________ toys

(c) The factory aims to produce 7,000 toys over these three days. Did the factory meet its target? Show how you check your answer. [2 marks]

Working:

Answer: _______________

End of Section C

THE END

Total marks for this paper: 50

Check your work before handing in your paper.

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Answers

TuitionGoWhere Exam Practice (AI)

Primary 3 Mathematics - SA2 Practice Paper Version 5

Answer Key and Marking Scheme

Total Marks: 50

SECTION A: Multiple-Choice Questions (20 marks)

Each question: 2 marks. No working required for marks, but concepts explained below for learning.

1. Answer: (2) 4

Concept: Place value in 4-digit numbers.

In 8,426, the places are: 8 (thousands), 4 (hundreds), 2 (tens), 6 (ones)
We read from right to left: ones, tens, hundreds, thousands
The hundreds digit is the third digit from the right

Common mistake: Choosing 8 (the first digit) without checking whether it asks for thousands or hundreds.

2. Answer: (4) 7,000

Concept: Value of a digit = digit × place value.

The digit 7 is in the thousands place
Value = 7 × 1,000 = 7,000
This is different from "the digit itself" which would just be 7

Key distinction: "Digit" (just the symbol) vs "value of the digit" (what it represents in that position).

3. Answer: (4) 4,802

Concept: Comparing 4-digit numbers by place value from left to right.

All numbers start with 4, so compare hundreds place
4,802 has 8 hundreds; 4,280 has 2 hundreds; 4,208 has 2 hundreds; 4,028 has 0 hundreds
8 hundreds > 2 hundreds > 0 hundreds

Method: Compare thousands → hundreds → tens → ones until you find a difference.

4. Answer: (2) 5,269

Concept: Converting expanded form to standard numerals.

5 thousands = 5,000
17 tens = 170 (17 × 10 = 170)
9 ones = 9
Total: 5,000 + 170 + 9 = 5,269

Common mistake: Writing 17 in the tens place directly as "17" to make 5,179. But 17 tens = 170, so the tens digit is 6 (with 1 hundred carried over: 5,000 + 100 + 160 + 9 = wait, let me recalculate: 17 tens = 10 tens + 7 tens = 1 hundred + 7 tens. So 5,000 + 100 + 60 + 9 = 5,169? No wait: 5,000 + (17 × 10) + 9 = 5,000 + 170 + 9 = 5,179... Hmm, let me recheck: 17 × 10 = 170. 5,000 + 170 = 5,170. + 9 = 5,179.

Wait, I need to recheck my answer. 5 thousands + 17 tens + 9 ones:

5,000 + 170 + 9 = 5,179

So the answer should be (1) 5,179 not (2) 5,269.

Corrected Answer: (1) 5,179

Working: 5,000 + (17 × 10) + 9 = 5,000 + 170 + 9 = 5,179

5. Answer: (3) 6,959 [Note: options 3 and 4 identical in paper, treat as 6,959]

Concept: Adding 100 to a number affects the hundreds place.

6,859 + 100 = 6,959
The hundreds digit increases by 1: 8 hundreds → 9 hundreds
No change to tens or ones digits

Mental method: 6,859 → 6,959 (jump 100)

6. Answer: (4) 4,600

Concept: Rounding to the nearest hundred.

Look at the tens digit: 4,567, tens digit is 6
Rule: If tens digit is 5 or more, round up
6 ≥ 5, so round 500 up to 600
Result: 4,600

Visual number line method: 4,567 is closer to 4,600 than to 4,500.

7. Answer: (2) 2,750

Concept: Identifying number patterns.

Pattern increases by 100 each time: 2,450, 2,550 (+100), 2,650 (+100)
Next: 2,650 + 100 = 2,750
Check: 2,750 + 100 = 2,850 ✓

8. Answer: (2) 3,209

Concept: Ascending order = smallest to largest.

First compare thousands: all have 3
Compare hundreds: 0, 0, 2, 9 → arrange: 0, 0, 2, 9
For 3,029 and 3,209: compare tens: 2 < 0? No wait: 3,029 has 2 tens, 3,209 has 0 tens. So 3,029 < 3,209
Full order: 3,029, 3,209, 3,290, 3,902
Second number: 3,209

9. Answer: (2) 900

Concept: Place value decomposition.

6,937 = 6,000 + 900 + 30 + 7
Missing number: 6,937 − 6,000 − 30 − 7 = 900
The 9 is in the hundreds place

10. Answer: (3) 5,889

Concept: Odd numbers end in 1, 3, 5, 7, or 9.

Must be odd: only 5,889 ends in 9 (odd digit)
Check range: 5,800 < 5,889 < 5,900 ✓
5,802 and 5,878 end in even digits; 5,900 ends in 0 (even)

SECTION B: Short-Answer Questions (20 marks)

Each question: 2 marks. 1 mark for correct method shown, 1 mark for correct final answer. If answer only with no working, 1 mark only (except simple place value questions).

11. Five thousand and sixty

Marking: 2 marks for correct answer. Accept "five thousand sixty" (common Singapore usage without "and").

Concept: Zero in the hundreds place means we say "and sixty" or just skip to tens. The zero is a placeholder.

12. 6,432

Working: 8,432 − 2,000 = 6,432

Marking: 2 marks (1 for method, 1 for answer). Or 2 marks for correct answer.

Concept: "Less than" means subtraction. 2,000 affects the thousands place.

13. 7,510, 7,501, 7,105, 7,015

Working:

Compare hundreds place: 7,510 and 7,501 have 5 hundreds; 7,105 has 1 hundred; 7,015 has 0 hundreds
Among 7,510 and 7,501: 7,510 > 7,501 (10 > 01 in tens place)
So: 7,510, 7,501, 7,105, 7,015

Marking: 2 marks for fully correct order. 1 mark if order is correct but ascending instead of descending (wrong direction).

14. 6,434

Working:

  3,456
+ 2,978
-------

Ones: 6 + 8 = 14, write 4, carry 1
Tens: 5 + 7 + 1 = 13, write 3, carry 1
Hundreds: 4 + 9 + 1 = 14, write 4, carry 1
Thousands: 3 + 2 + 1 = 6

Answer: 6,434

Marking: 1 mark for correct column addition method shown, 1 mark for correct answer. Deduct 1 if no regrouping shown but answer correct (insufficient working for this level).

15. 3,711

Working:

  5,000
- 1,289
-------

Need to regroup: 5,000 = 4,900 + 100 = 4,990 + 10 = ...
Standard algorithm with multiple regroupings:
- Ones: 0 − 9, borrow from tens (tens is 0, so keep borrowing)
- 5,000 → 4,000 + 900 + 90 + 10, then borrow for ones: 10 − 9 = 1
- Tens: 90 − 1 (borrowed) − 8 = 80 − 8... wait, let me be clearer:
5,000 = 4,999 + 10 (not standard)

Better standard:
- 5,000: borrow 1 thousand → 4 thousands, 10 hundreds
- 10 hundreds: borrow 1 hundred → 9 hundreds, 10 tens
- 10 tens: borrow 1 ten → 9 tens, 10 ones
- Now: 10 − 9 = 1; 9 − 8 = 1; 9 − 2 = 7; 4 − 1 = 3
Answer: 3,711

Marking: 1 mark for method showing regrouping understanding, 1 mark for correct answer.

16. 8,521

Concept: Greatest number → largest digits in highest places.

Arrange digits 8, 5, 2, 1 in descending order for places: 8 (thousands), 5 (hundreds), 2 (tens), 1 (ones)
Answer: 8,521

Marking: 2 marks. 1 mark for understanding largest digit goes to thousands place.

17. 3,250

Concept: Rounding to nearest ten.

Look at ones digit: 3,249, ones digit is 9
9 ≥ 5, so round up: 240 → 250
Answer: 3,250

Marking: 2 marks (1 for identifying ones digit determines rounding, 1 for correct answer).

18. 4,700, 4,900

Pattern: Increasing by 200 each time.

4,100 + 200 = 4,300
4,300 + 200 = 4,500
4,500 + 200 = 4,700
4,700 + 200 = 4,900

Marking: 2 marks (1 mark per blank). Both must be correct for full marks.

19. 8,910

Working:

First 9 (leftmost): in thousands place → value = 9,000
Second 9 (third digit): in tens place → value = 90
Difference: 9,000 − 90 = 8,910

Marking: 1 mark for identifying both place values correctly, 1 mark for correct subtraction.

Common mistake: Answering "0" by subtracting digits (9 − 9 = 0) without considering place value.

20. 7,450

Concept: Rounding to nearest hundred gives 7,500.

Numbers rounding to 7,500: from 7,450 to 7,549
Smallest of these: 7,450 (it rounds up because tens digit is 5)

Marking: 2 marks. Common wrong answer: 7,500 (the rounded value itself, not the smallest original).

SECTION C: Word Problems (10 marks)

21. 1,644 stickers [3 marks]

Working:

Stickers given away: 1,289 + 1,567
1,289 + 1,567 = 2,856
Stickers left: 4,500 − 2,856
4,500 − 2,856 = 1,644

  4,500
- 2,856
-------
  1,644

(Regrouping required: 4,500 = 3,000 + 1,400 + 90 + 10, etc.)

Marking breakdown:

1 mark: Correct method to find total given away (addition)
1 mark: Correct method to find remainder (subtraction from 4,500)
1 mark: Correct final answer with correct units

If student does 4,500 − 1,289 − 1,567 in one chain, same marking applies.

22. (a) 4,221 toys [1 mark]

Working: 2,345 + 1,876 = 4,221

Marking: 1 mark for correct addition with units.

22. (b) 213 toys [2 marks]

Working: 2,089 − 1,876

  2,089
- 1,876
-------
    213

Answer: 213 more toys

Marking breakdown:

1 mark: Correct subtraction method (identify larger minus smaller, correct alignment)
1 mark: Correct answer with units

22. (c) No, the factory did not meet its target. [2 marks]

Working:

Total produced: 2,345 + 1,876 + 2,089 = 6,310
- Or use part (a): 4,221 + 2,089 = 6,310
Compare with target: 6,310 < 7,000
Difference: 7,000 − 6,310 = 690

Answer: No, the factory did not meet its target. It produced 6,310 toys, which is 690 toys short.

Marking breakdown:

1 mark: Correct method to find total production (must reference or recalculate)
1 mark: Correct comparison and conclusion stated clearly

Accept: "No" with correct working showing 6,310 and that this is less than 7,000.

END OF ANSWER KEY

Total marks: 50 marks

Section	Marks
A	20
B	20
C	10
Total	50