Identifying fractions using blocks - a Grade 3 math worksheet for practicing fraction recognition with visual models.

The worksheet provided is designed to help students identify fractions using blocks. Each question shows a set of blocks, some of which are shaded, and the task is to write the fraction that represents the shaded portion.

Explanation of How to Solve:

1. Identify the Total Number of Blocks: Count how many blocks there are in total.
2. Identify the Shaded Blocks: Count how many blocks are shaded.
3. Write the Fraction: The fraction is written as:
- Numerator: The number of shaded blocks.
- Denominator: The total number of blocks.

Solution for Each Question:

#### 1.
- Total blocks: 4
- Shaded blocks: 1
- Fraction: \( \frac{1}{4} \)

#### 2.
- Total blocks: 5
- Shaded blocks: 2
- Fraction: \( \frac{2}{5} \)

#### 3.
- Total blocks: 8
- Shaded blocks: 3
- Fraction: \( \frac{3}{8} \)

#### 4.
- Total blocks: 6
- Shaded blocks: 4
- Fraction: \( \frac{4}{6} \) (This can be simplified to \( \frac{2}{3} \), but typically, the unsimplified form is acceptable in such exercises.)

#### 5.
- Total blocks: 5
- Shaded blocks: 4
- Fraction: \( \frac{4}{5} \)

#### 6.
- Total blocks: 1
- Shaded blocks: 1
- Fraction: \( \frac{1}{1} \) or simply 1

#### 7.
- Total blocks: 7
- Shaded blocks: 2
- Fraction: \( \frac{2}{7} \)

#### 8.
- Total blocks: 4
- Shaded blocks: 3
- Fraction: \( \frac{3}{4} \)

#### 9.
- Total blocks: 6
- Shaded blocks: 1
- Fraction: \( \frac{1}{6} \)

#### 10.
- Total blocks: 3
- Shaded blocks: 2
- Fraction: \( \frac{2}{3} \)

#### 11.
- Total blocks: 10
- Shaded blocks: 4
- Fraction: \( \frac{4}{10} \) (This can be simplified to \( \frac{2}{5} \).)

#### 12.
- Total blocks: 6
- Shaded blocks: 5
- Fraction: \( \frac{5}{6} \)

#### 13.
- Total blocks: 8
- Shaded blocks: 3
- Fraction: \( \frac{3}{8} \)

#### 14.
- Total blocks: 7
- Shaded blocks: 5
- Fraction: \( \frac{5}{7} \)

#### 15.
- Total blocks: 4
- Shaded blocks: 3
- Fraction: \( \frac{3}{4} \)

#### 16.
- Total blocks: 9
- Shaded blocks: 6
- Fraction: \( \frac{6}{9} \) (This can be simplified to \( \frac{2}{3} \).)

#### 17.
- Total blocks: 5
- Shaded blocks: 1
- Fraction: \( \frac{1}{5} \)

#### 18.
- Total blocks: 8
- Shaded blocks: 5
- Fraction: \( \frac{5}{8} \)

Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & \frac{1}{4} \\
2. & \frac{2}{5} \\
3. & \frac{3}{8} \\
4. & \frac{4}{6} \\
5. & \frac{4}{5} \\
6. & \frac{1}{1} \\
7. & \frac{2}{7} \\
8. & \frac{3}{4} \\
9. & \frac{1}{6} \\
10. & \frac{2}{3} \\
11. & \frac{4}{10} \\
12. & \frac{5}{6} \\
13. & \frac{3}{8} \\
14. & \frac{5}{7} \\
15. & \frac{3}{4} \\
16. & \frac{6}{9} \\
17. & \frac{1}{5} \\
18. & \frac{5}{8} \\
\end{array}
}
\]

If you need further clarification or have additional questions, feel free to ask!