Math worksheet for practicing multiplication of two-digit multiples of 10 by single-digit numbers.

Problem Description:

The task involves multiplying two-digit multiples of 10 by single-digit numbers (2, 3, 4, or 5). The goal is to solve each multiplication problem and provide the answers.

Solution:

We will solve each multiplication problem step by step. Let's go through them one by one:

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#### 1. \( 20 \times 2 \)
- \( 20 \times 2 = 40 \)

#### 2. \( 3 \times 30 \)
- \( 3 \times 30 = 90 \)

#### 3. \( 40 \times 3 \)
- \( 40 \times 3 = 120 \)

#### 4. \( 4 \times 50 \)
- \( 4 \times 50 = 200 \)

#### 5. \( 50 \times 4 \)
- \( 50 \times 4 = 200 \)

#### 6. \( 2 \times 40 \)
- \( 2 \times 40 = 80 \)

#### 7. \( 40 \times 4 \)
- \( 40 \times 4 = 160 \)

#### 8. \( 5 \times 30 \)
- \( 5 \times 30 = 150 \)

#### 9. \( 50 \times 5 \)
- \( 50 \times 5 = 250 \)

#### 10. \( 3 \times 20 \)
- \( 3 \times 20 = 60 \)

#### 11. \( 50 \times 10 \)
- \( 50 \times 10 = 500 \)

#### 12. \( 10 \times 20 \)
- \( 10 \times 20 = 200 \)

#### 13. \( 30 \times 2 \)
- \( 30 \times 2 = 60 \)

#### 14. \( 2 \times 10 \)
- \( 2 \times 10 = 20 \)

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Final Answers:

\[
\begin{aligned}
1. & \quad 20 \times 2 = 40 \\
2. & \quad 3 \times 30 = 90 \\
3. & \quad 40 \times 3 = 120 \\
4. & \quad 4 \times 50 = 200 \\
5. & \quad 50 \times 4 = 200 \\
6. & \quad 2 \times 40 = 80 \\
7. & \quad 40 \times 4 = 160 \\
8. & \quad 5 \times 30 = 150 \\
9. & \quad 50 \times 5 = 250 \\
10. & \quad 3 \times 20 = 60 \\
11. & \quad 50 \times 10 = 500 \\
12. & \quad 10 \times 20 = 200 \\
13. & \quad 30 \times 2 = 60 \\
14. & \quad 2 \times 10 = 20 \\
\end{aligned}
\]

Boxed Final Answer:

\[
\boxed{40, 90, 120, 200, 200, 80, 160, 150, 250, 60, 500, 200, 60, 20}
\]