Multiplication by 2 worksheet for elementary math practice.

Problem Description:

The task is to solve a multiplication worksheet where each row involves multiplying a number by 2. The worksheet is divided into two columns, and the goal is to fill in the blanks with the correct answers.

Worksheet Layout:

The left column involves multiplying numbers from 0 to 9 by 2.
The right column involves multiplying numbers from 1 to 9 by 2, but in reverse order (starting from 9 and going down to 0).

Solution Approach:

We will calculate each multiplication problem step by step and fill in the blanks accordingly.

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#### Left Column: Multiplying by 2
1. \( 2 \times 0 = 0 \)
2. \( 2 \times 1 = 2 \)
3. \( 2 \times 2 = 4 \)
4. \( 2 \times 3 = 6 \)
5. \( 2 \times 4 = 8 \)
6. \( 2 \times 5 = 10 \)
7. \( 2 \times 6 = 12 \)
8. \( 2 \times 7 = 14 \)
9. \( 2 \times 8 = 16 \)
10. \( 2 \times 9 = 18 \)

#### Right Column: Multiplying by 2
1. \( 9 \times 2 = 18 \)
2. \( 8 \times 2 = 16 \)
3. \( 7 \times 2 = 14 \)
4. \( 6 \times 2 = 12 \)
5. \( 5 \times 2 = 10 \)
6. \( 4 \times 2 = 8 \)
7. \( 3 \times 2 = 6 \)
8. \( 2 \times 2 = 4 \)
9. \( 1 \times 2 = 2 \)
10. \( 0 \times 2 = 0 \)

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Filled Worksheet:

Here is the completed worksheet:

| Multiplication |
|----------------|
| \( 2 \times 0 = 0 \) | \( 9 \times 2 = 18 \) |
| \( 2 \times 1 = 2 \) | \( 8 \times 2 = 16 \) |
| \( 2 \times 2 = 4 \) | \( 7 \times 2 = 14 \) |
| \( 2 \times 3 = 6 \) | \( 6 \times 2 = 12 \) |
| \( 2 \times 4 = 8 \) | \( 5 \times 2 = 10 \) |
| \( 2 \times 5 = 10 \) | \( 4 \times 2 = 8 \) |
| \( 2 \times 6 = 12 \) | \( 3 \times 2 = 6 \) |
| \( 2 \times 7 = 14 \) | \( 2 \times 2 = 4 \) |
| \( 2 \times 8 = 16 \) | \( 1 \times 2 = 2 \) |
| \( 2 \times 9 = 18 \) | \( 0 \times 2 = 0 \) |

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Final Answer:

\[
\boxed{
\begin{array}{ll}
2 \times 0 = 0 & 9 \times 2 = 18 \\
2 \times 1 = 2 & 8 \times 2 = 16 \\
2 \times 2 = 4 & 7 \times 2 = 14 \\
2 \times 3 = 6 & 6 \times 2 = 12 \\
2 \times 4 = 8 & 5 \times 2 = 10 \\
2 \times 5 = 10 & 4 \times 2 = 8 \\
2 \times 6 = 12 & 3 \times 2 = 6 \\
2 \times 7 = 14 & 2 \times 2 = 4 \\
2 \times 8 = 16 & 1 \times 2 = 2 \\
2 \times 9 = 18 & 0 \times 2 = 0 \\
\end{array}
}
\]