Missing Addends math worksheet for elementary students to practice addition by finding the missing numbers.

Problem Overview:

The task involves solving each number sentence by finding the missing addend. An addend is a number that is added to another number in an addition problem. The goal is to determine what number should replace the blank (□) in each equation so that the equation holds true.

Solution Approach:

For each equation, we will isolate the missing addend by using basic arithmetic. Specifically:
- If the equation is of the form \( A + \square = B \), then the missing addend is \( B - A \).
- If the equation is of the form \( \square + A = B \), then the missing addend is \( B - A \).

Let's solve each equation step by step.

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Step-by-Step Solutions:

#### Row 1:
1. \( 5 + \square = 11 \)
- Missing addend: \( 11 - 5 = 6 \)
- Answer: \( 6 \)

2. \( \square + 9 = 12 \)
- Missing addend: \( 12 - 9 = 3 \)
- Answer: \( 3 \)

#### Row 2:
3. \( \square + 8 = 13 \)
- Missing addend: \( 13 - 8 = 5 \)
- Answer: \( 5 \)

4. \( 8 + \square = 14 \)
- Missing addend: \( 14 - 8 = 6 \)
- Answer: \( 6 \)

#### Row 3:
5. \( 4 + \square = 15 \)
- Missing addend: \( 15 - 4 = 11 \)
- Answer: \( 11 \)

6. \( \square + 6 = 8 \)
- Missing addend: \( 8 - 6 = 2 \)
- Answer: \( 2 \)

#### Row 4:
7. \( \square + 6 = 9 \)
- Missing addend: \( 9 - 6 = 3 \)
- Answer: \( 3 \)

8. \( 0 + \square = 7 \)
- Missing addend: \( 7 - 0 = 7 \)
- Answer: \( 7 \)

#### Row 5:
9. \( 7 + \square = 14 \)
- Missing addend: \( 14 - 7 = 7 \)
- Answer: \( 7 \)

10. \( \square + 1 = 9 \)
- Missing addend: \( 9 - 1 = 8 \)
- Answer: \( 8 \)

#### Row 6:
11. \( \square + 4 = 8 \)
- Missing addend: \( 8 - 4 = 4 \)
- Answer: \( 4 \)

12. \( 5 + \square = 13 \)
- Missing addend: \( 13 - 5 = 8 \)
- Answer: \( 8 \)

#### Row 7:
13. \( 9 + \square = 15 \)
- Missing addend: \( 15 - 9 = 6 \)
- Answer: \( 6 \)

14. \( \square + 4 = 11 \)
- Missing addend: \( 11 - 4 = 7 \)
- Answer: \( 7 \)

#### Row 8:
15. \( \square + 5 = 11 \)
- Missing addend: \( 11 - 5 = 6 \)
- Answer: \( 6 \)

16. \( 9 + \square = 17 \)
- Missing addend: \( 17 - 9 = 8 \)
- Answer: \( 8 \)

#### Row 9:
17. \( 2 + \square = 10 \)
- Missing addend: \( 10 - 2 = 8 \)
- Answer: \( 8 \)

18. \( \square + 6 = 9 \)
- Missing addend: \( 9 - 6 = 3 \)
- Answer: \( 3 \)

#### Row 10:
19. \( \square + 7 = 17 \)
- Missing addend: \( 17 - 7 = 10 \)
- Answer: \( 10 \)

20. \( 3 + \square = 7 \)
- Missing addend: \( 7 - 3 = 4 \)
- Answer: \( 4 \)

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Final Answers:

\[
\begin{array}{|c|c|}
\hline
5 + 6 = 11 & 3 + 9 = 12 \\
5 + 8 = 13 & 8 + 6 = 14 \\
4 + 11 = 15 & 2 + 6 = 8 \\
3 + 6 = 9 & 0 + 7 = 7 \\
7 + 7 = 14 & 8 + 1 = 9 \\
4 + 4 = 8 & 5 + 8 = 13 \\
9 + 6 = 15 & 7 + 4 = 11 \\
6 + 5 = 11 & 9 + 8 = 17 \\
2 + 8 = 10 & 3 + 6 = 9 \\
10 + 7 = 17 & 3 + 4 = 7 \\
\hline
\end{array}
\]

\boxed{
\begin{array}{|c|c|}
\hline
6 & 3 \\
5 & 6 \\
11 & 2 \\
3 & 7 \\
7 & 8 \\
4 & 8 \\
6 & 7 \\
6 & 8 \\
8 & 3 \\
10 & 4 \\
\hline
\end{array}
}