Repeated addition arrays activities for year 1, 2, 3 worksheets - Free Printable

Problem Description:

The task involves analyzing arrays of blue dots and writing a multiplication sentence for each array. An array is a rectangular arrangement of objects in rows and columns, which can be represented as a multiplication problem.

Solution Approach:

1. Identify the Rows and Columns: For each array, count the number of rows and the number of columns.
2. Write the Multiplication Sentence: The total number of dots in the array is the product of the number of rows and the number of columns. The multiplication sentence will be in the form:
\[
(\text{Number of Rows}) \times (\text{Number of Columns}) = (\text{Total Number of Dots})
\]

Step-by-Step Analysis of Each Array:

#### 1.
- Rows: 2
- Columns: 5
- Multiplication Sentence:
\[
2 \times 5 = 10
\]

#### 2.
- Rows: 3
- Columns: 4
- Multiplication Sentence:
\[
3 \times 4 = 12
\]

#### 3.
- Rows: 2
- Columns: 10
- Multiplication Sentence:
\[
2 \times 10 = 20
\]

#### 4.
- Rows: 4
- Columns: 6
- Multiplication Sentence:
\[
4 \times 6 = 24
\]

#### 5.
- Rows: 3
- Columns: 5
- Multiplication Sentence:
\[
3 \times 5 = 15
\]

#### 6.
- Rows: 2
- Columns: 7
- Multiplication Sentence:
\[
2 \times 7 = 14
\]

#### 7.
- Rows: 5
- Columns: 1
- Multiplication Sentence:
\[
5 \times 1 = 5
\]

#### 8.
- Rows: 3
- Columns: 4
- Multiplication Sentence:
\[
3 \times 4 = 12
\]

#### 9.
- Rows: 2
- Columns: 8
- Multiplication Sentence:
\[
2 \times 8 = 16
\]

#### 10.
- Rows: 4
- Columns: 5
- Multiplication Sentence:
\[
4 \times 5 = 20
\]

#### 11.
- Rows: 2
- Columns: 3
- Multiplication Sentence:
\[
2 \times 3 = 6
\]

#### 12.
- Rows: 3
- Columns: 8
- Multiplication Sentence:
\[
3 \times 8 = 24
\]

Final Answer:

\[
\boxed{
\begin{aligned}
1. & \quad 2 \times 5 = 10 \\
2. & \quad 3 \times 4 = 12 \\
3. & \quad 2 \times 10 = 20 \\
4. & \quad 4 \times 6 = 24 \\
5. & \quad 3 \times 5 = 15 \\
6. & \quad 2 \times 7 = 14 \\
7. & \quad 5 \times 1 = 5 \\
8. & \quad 3 \times 4 = 12 \\
9. & \quad 2 \times 8 = 16 \\
10. & \quad 4 \times 5 = 20 \\
11. & \quad 2 \times 3 = 6 \\
12. & \quad 3 \times 8 = 24 \\
\end{aligned}
}
\]