Math worksheet for learning number decomposition within 10 using a sprinkler theme.

Problem Description:

The task involves coloring sprinklers to make a total of 10 and then completing the number sentences. The goal is to decompose numbers within 10 by identifying pairs of numbers that add up to 10.

Step-by-Step Solution:

#### Part 1: Understanding the Task
- Each row contains a set of sprinklers.
- Some sprinklers are already colored (indicated by a different color or shading).
- The task is to color additional sprinklers so that the total number of colored sprinklers equals 10.
- After coloring, complete the number sentence in the form: \( \square + \square = 10 \).

#### Part 2: Solving Each Row

##### Row 1:
- Total sprinklers: 10
- Colored sprinklers: 3 (already colored)
- Remaining sprinklers to color: \( 10 - 3 = 7 \)
- Number sentence: \( 3 + 7 = 10 \)

This part is already completed in the image.

##### Row 2:
- Total sprinklers: 10
- Colored sprinklers: 4 (already colored)
- Remaining sprinklers to color: \( 10 - 4 = 6 \)
- Number sentence: \( 4 + 6 = 10 \)

So, color 6 more sprinklers to complete this row.

##### Row 3:
- Total sprinklers: 10
- Colored sprinklers: 5 (already colored)
- Remaining sprinklers to color: \( 10 - 5 = 5 \)
- Number sentence: \( 5 + 5 = 10 \)

So, color 5 more sprinklers to complete this row.

##### Row 4:
- Total sprinklers: 10
- Colored sprinklers: 6 (already colored)
- Remaining sprinklers to color: \( 10 - 6 = 4 \)
- Number sentence: \( 6 + 4 = 10 \)

So, color 4 more sprinklers to complete this row.

#### Part 3: Final Answers
- Row 2: \( 4 + 6 = 10 \)
- Row 3: \( 5 + 5 = 10 \)
- Row 4: \( 6 + 4 = 10 \)

Final Answer:

\[
\boxed{4 + 6 = 10, \, 5 + 5 = 10, \, 6 + 4 = 10}
\]