Primary 3 Mathematics Fractions Quiz

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Primary 3 Mathematics Quiz - Fractions

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: ___________ / 20

Duration: 40 minutes
Total Marks: 20

Instructions:

• This quiz has 20 questions on Fractions.
• Section A: 10 short questions (1 mark each).
• Section B: 6 questions (1 mark each).
• Section C: 4 questions (1 mark each).
• Write your answers in the spaces provided.
• Show working where needed.

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Section A (Questions 1–10, 1 mark each)

1. Which fraction is equivalent to $\frac{1}{2}$?
   $\frac{2}{3}$ $\frac{2}{4}$ $\frac{3}{4}$
   Answer: __________

2. Write $\frac{4}{8}$ in its simplest form.
   Answer: __________

3. Which is larger: $\frac{1}{3}$ or $\frac{1}{4}$?
   Answer: __________

4. Find the missing numerator: $\frac{2}{5} = \frac{ }{10}$
   Answer: __________

5. Arrange in order from smallest to largest: $\frac{1}{2}, \frac{1}{4}, \frac{3}{4}$
   Answer: ________________________

6. What fraction of the shape is shaded?

Generated diagram for Q6.

Answer: __________

7. Add: $\frac{1}{3} + \frac{1}{3} =$
   Answer: __________

8. Subtract: $\frac{3}{4} - \frac{1}{4} =$
   Answer: __________

9. Express $\frac{6}{9}$ in simplest form.
   Answer: __________

10. Which fraction is equal to $\frac{3}{6}$?
    $\frac{1}{3}$ $\frac{1}{2}$ $\frac{2}{3}$
    Answer: __________

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Section B (Questions 11–16, 1 mark each)

11. Add related fractions: $\frac{1}{2} + \frac{1}{4} =$
    Answer: __________

12. Subtract: $\frac{5}{6} - \frac{1}{3} =$
    Answer: __________

13. Find the equivalent fraction: $\frac{3}{4} = \frac{ }{12}$
    Answer: __________

14. A cake is cut into 8 equal pieces. Siti eats 3 pieces. What fraction of the cake is left?
    Answer: __________

15. Which is smaller: $\frac{2}{5}$ or $\frac{3}{5}$?
    Answer: __________

16. Write two equivalent fractions for $\frac{1}{3}$.
    Answer: ________________________

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Section C (Questions 17–20, 1 mark each)

17. Mrs Tan bought a pizza. She gave $\frac{1}{6}$ to her son and $\frac{2}{6}$ to her daughter. What fraction did she give away altogether?
    Answer: __________

18. A ribbon is $\frac{7}{10}$ m long. Lim cuts off $\frac{3}{10}$ m. What length is left?
    Answer: __________

19. Compare: $\frac{5}{12}$ ___ $\frac{7}{12}$ (use > or <)
    Answer: __________

20. Fill in the blank: $\frac{2}{3} = \frac{4}{ }$
    Answer: __________

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Primary 3 Mathematics Quiz - Fractions (Answer Key)

Total Marks: 20
Topic: Fractions (Equivalent, Compare, Add/Subtract related)

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Section A

Q1. $\frac{2}{4}$
Teaching note: Equivalent fractions have the same value. $\frac{1}{2} = \frac{1\times2}{2\times2} = \frac{2}{4}$. Common mistake: picking $\frac{2}{3}$ because the numbers look similar.

Q2. $\frac{1}{2}$
Working: Divide numerator and denominator by 4: $\frac{4\div4}{8\div4} = \frac{1}{2}$.

Q3. $\frac{1}{3}$
Reasoning: Same numerator (1), smaller denominator means larger pieces. So $\frac{1}{3} > \frac{1}{4}$.

Q4. 4
Working: $\frac{2}{5} = \frac{2\times2}{5\times2} = \frac{4}{10}$. Missing numerator is 4.

Q5. $\frac{1}{4}, \frac{1}{2}, \frac{3}{4}$
Method: Use same denominator 4: $\frac{1}{4}, \frac{2}{4}, \frac{3}{4}$ → order clear.

Q6. $\frac{1}{4}$
Visual check: Rectangle split into 4 equal parts, 1 shaded → 1 out of 4 = $\frac{1}{4}$.

Q7. $\frac{2}{3}$
Working: $\frac{1}{3}+\frac{1}{3} = \frac{1+1}{3} = \frac{2}{3}$.

Q8. $\frac{2}{4}$ (or $\frac{1}{2}$)
Working: $\frac{3}{4}-\frac{1}{4} = \frac{2}{4} = \frac{1}{2}$.

Q9. $\frac{2}{3}$
Working: Divide by 3: $\frac{6\div3}{9\div3} = \frac{2}{3}$.

Q10. $\frac{1}{2}$
Reasoning: $\frac{3}{6} = \frac{3\div3}{6\div3} = \frac{1}{2}$.

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Section B

Q11. $\frac{3}{4}$
Working: $\frac{1}{2} = \frac{2}{4}$, so $\frac{2}{4}+\frac{1}{4} = \frac{3}{4}$.

Q12. $\frac{1}{2}$ (or $\frac{3}{6}$)
Working: $\frac{1}{3} = \frac{2}{6}$, $\frac{5}{6}-\frac{2}{6} = \frac{3}{6} = \frac{1}{2}$.

Q13. 9
Working: $\frac{3}{4} = \frac{3\times3}{4\times3} = \frac{9}{12}$.

Q14. $\frac{5}{8}$
Working: 8 pieces total, 3 eaten, left = $8-3=5$ pieces → $\frac{5}{8}$.

Q15. $\frac{2}{5}$
Reasoning: Same denominator, smaller numerator is smaller fraction.

Q16. $\frac{2}{6}, \frac{3}{9}$ (other correct answers: $\frac{4}{12}$ etc.)
Method: Multiply by 2, 3: $\frac{1\times2}{3\times2}=\frac{2}{6}$, $\frac{1\times3}{3\times3}=\frac{3}{9}$.

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Section C

Q17. $\frac{3}{6}$ (or $\frac{1}{2}$)
Working: $\frac{1}{6}+\frac{2}{6} = \frac{3}{6} = \frac{1}{2}$.

Q18. $\frac{4}{10}$ m
Working: $\frac{7}{10}-\frac{3}{10} = \frac{4}{10}$ m.

Q19. <
Reasoning: Same denominator 12, 5 < 7 so $\frac{5}{12} < \frac{7}{12}$.

Q20. 6
Working: $\frac{2}{3} = \frac{2\times2}{3\times2} = \frac{4}{6}$. Blank is 6.