Primary 2 Mathematics Fractions Quiz

Primary 2 Mathematics Quiz - Fractions: Answer Key

Total Marks: 20

Section A: Understanding Fractions (Questions 1 to 5)

(1 mark each)

1.

• Answer: $\frac{1}{4}$
• Explanation: The circle is divided into 4 equal parts. One part is shaded. The denominator (bottom number) is 4, which tells us the total number of equal parts. The numerator (top number) is 1, which tells us how many parts are shaded.
• Marking: 1 mark for correct fraction.

2.

• Answer: $\frac{2}{6}$
• Explanation: The rectangle is divided into 6 equal parts. Two parts are shaded. So the fraction is 2 out of 6, or $\frac{2}{6}$.
• Marking: 1 mark for correct fraction.

3.

• Answer: $\frac{4}{9}$
• Explanation: The square is divided into 9 equal smaller squares. Four of them are shaded. The fraction is $\frac{4}{9}$.
• Marking: 1 mark for correct fraction.

4.

• Answer: $\frac{3}{8}$
• Explanation: There are 8 stars in total. 3 of them are circled. The fraction of the group that is circled is $\frac{3}{8}$.
• Marking: 1 mark for correct fraction.

5.

• Answer: A
• Explanation: $\frac{1}{2}$ means 1 out of 2 equal parts. In option A, the square is divided into 2 equal triangles, and 1 triangle is shaded. This is $\frac{1}{2}$. Option B shows $\frac{1}{4}$ (1 out of 4 parts). Option C shows $\frac{1}{3}$ (1 out of 3 parts).
• Marking: 1 mark for circling A.

Section B: Comparing and Ordering Fractions (Questions 6 to 10)

(1 mark each)

6.

• Answer: $\frac{1}{2}$
• Explanation: When comparing unit fractions (fractions with numerator 1), the fraction with the smaller denominator is larger. This is because the whole is divided into fewer parts, so each part is bigger. $\frac{1}{2}$ means 1 out of 2 parts, while $\frac{1}{4}$ means 1 out of 4 parts. A half is bigger than a quarter.
• Marking: 1 mark for circling $\frac{1}{2}$.

7.

• Answer: $\frac{1}{5}$
• Explanation: When comparing unit fractions, the fraction with the larger denominator is smaller. $\frac{1}{5}$ means 1 out of 5 parts, while $\frac{1}{3}$ means 1 out of 3 parts. Fifths are smaller than thirds.
• Marking: 1 mark for circling $\frac{1}{5}$.

8.

• Answer: $\frac{1}{8}$, $\frac{1}{4}$, $\frac{1}{2}$
• Explanation: All are unit fractions. The fraction with the largest denominator is the smallest. So $\frac{1}{8}$ is the smallest, then $\frac{1}{4}$, and $\frac{1}{2}$ is the largest.
• Marking: 1 mark for correct order. Accept answers written as a list or with "smallest" and "biggest" labels.

9.

• Answer: $\frac{5}{8}$
• Explanation: These are like fractions (same denominator). When the denominators are the same, the fraction with the larger numerator is larger. $\frac{5}{8}$ has the largest numerator (5), so it is the largest fraction.
• Marking: 1 mark for circling $\frac{5}{8}$.

10.

• Answer: $\frac{1}{6}$
• Explanation: These are like fractions (same denominator). When the denominators are the same, the fraction with the smaller numerator is smaller. $\frac{1}{6}$ has the smallest numerator (1), so it is the smallest fraction.
• Marking: 1 mark for circling $\frac{1}{6}$.

Section C: Adding and Subtracting Like Fractions (Questions 11 to 15)

(1 mark each)

11.

• Answer: $\frac{3}{5}$
• Explanation: When adding like fractions (same denominator), add the numerators and keep the denominator the same. $2 + 1 = 3$, so the answer is $\frac{3}{5}$.
• Marking: 1 mark for correct answer.

12.

• Answer: $\frac{5}{7}$
• Explanation: Add the numerators: $3 + 2 = 5$. Keep the denominator: 7. Answer: $\frac{5}{7}$.
• Marking: 1 mark for correct answer.

13.

• Answer: $\frac{3}{9}$
• Explanation: When subtracting like fractions, subtract the numerators and keep the denominator the same. $5 - 2 = 3$, so the answer is $\frac{3}{9}$.
• Marking: 1 mark for correct answer.

14.

• Answer: $\frac{4}{10}$
• Explanation: Subtract the numerators: $7 - 3 = 4$. Keep the denominator: 10. Answer: $\frac{4}{10}$.
• Marking: 1 mark for correct answer.

15.

• Answer: $\frac{5}{6}$
• Explanation: Add the numerators: $1 + 4 = 5$. Keep the denominator: 6. Answer: $\frac{5}{6}$.
• Marking: 1 mark for correct answer.

Section D: Word Problems with Fractions (Questions 16 to 20)

(1 mark each)

16.

• Answer: $\frac{3}{8}$
• Explanation: The pizza is cut into 8 equal slices. The denominator is 8. Sam eats 3 slices. The numerator is 3. So the fraction is $\frac{3}{8}$.
• Marking: 1 mark for correct fraction.

17.

• Answer: $\frac{4}{10}$
• Explanation: There are 10 apples in total. The denominator is 10. 4 of them are red. The numerator is 4. So the fraction of red apples is $\frac{4}{10}$.
• Marking: 1 mark for correct fraction.

18.

• Answer: $\frac{7}{12}$
• Explanation: The whole ribbon is $\frac{12}{12}$. Lily cuts off $\frac{5}{12}$. To find the fraction left, subtract: $\frac{12}{12} - \frac{5}{12} = \frac{7}{12}$.
• Marking: 1 mark for correct fraction.

19.

• Answer: 2
• Explanation: $\frac{2}{6}$ means 2 out of 6 equal parts. The bag has 6 sweets. So $\frac{2}{6}$ of the sweets is 2 sweets.
• Marking: 1 mark for correct answer with unit "sweets".

20.

• Answer: $\frac{7}{8}$
• Explanation: The cake is cut into 8 equal pieces. $\frac{3}{8}$ has chocolate icing and $\frac{4}{8}$ has vanilla icing. To find the total fraction with icing, add: $\frac{3}{8} + \frac{4}{8} = \frac{7}{8}$.
• Marking: 1 mark for correct fraction.

End of Answer Key