Single Digit Addition Worksheet (Sheet 9) with 20 problems for practice.

Let's solve each of the single-digit addition problems on the worksheet step by step.

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Single Digit Addition Worksheet (Sheet 9)

We'll go through each problem and provide the answer:

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Row 1:
1. $ 8 + 3 = 11 $
2. $ 0 + 1 = 1 $
3. $ 9 + 1 = 10 $
4. $ 7 + 3 = 10 $
5. $ 1 + 4 = 5 $

Row 2:
6. $ 1 + 0 = 1 $
7. $ 1 + 8 = 9 $
8. $ 1 + 8 = 9 $
9. $ 8 + 0 = 8 $
10. $ 1 + 9 = 10 $

Row 3:
11. $ 6 + 1 = 7 $
12. $ 5 + 2 = 7 $
13. $ 8 + 7 = 15 $
14. $ 0 + 6 = 6 $
15. $ 3 + 2 = 5 $

Row 4:
16. $ 5 + 0 = 5 $
17. $ 9 + 7 = 16 $
18. $ 2 + 5 = 7 $
19. $ 9 + 2 = 11 $
20. $ 1 + 3 = 4 $

Row 5:
21. $ 6 + 3 = 9 $
22. $ 8 + 7 = 15 $
23. $ 2 + 4 = 6 $
24. $ 6 + 7 = 13 $
25. $ 8 + 1 = 9 $

Row 6:
26. $ 4 + 2 = 6 $
27. $ 1 + 9 = 10 $
28. $ 0 + 3 = 3 $
29. $ 8 + 3 = 11 $
30. $ 1 + 9 = 10 $

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✔ Final Answers (in order):

```
11, 1, 10, 10, 5,
1, 9, 9, 8, 10,
7, 7, 15, 6, 5,
5, 16, 7, 11, 4,
9, 15, 6, 13, 9,
6, 10, 3, 11, 10
```

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🔍 Explanation:

- All problems involve adding two single-digit numbers (0–9).
- Some results are double digits, like $ 8 + 7 = 15 $, which is okay since the sum can be greater than 9.
- Adding zero to any number gives the same number (e.g., $ 5 + 0 = 5 $).
- The commutative property applies: $ a + b = b + a $, so $ 1 + 8 = 8 + 1 = 9 $.

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✔ Completed Worksheet Answer Key:

| Problem | Answer |
|--------|--------|
| 8 + 3 | 11 |
| 0 + 1 | 1 |
| 9 + 1 | 10 |
| 7 + 3 | 10 |
| 1 + 4 | 5 |
| 1 + 0 | 1 |
| 1 + 8 | 9 |
| 1 + 8 | 9 |
| 8 + 0 | 8 |
| 1 + 9 | 10 |
| 6 + 1 | 7 |
| 5 + 2 | 7 |
| 8 + 7 | 15 |
| 0 + 6 | 6 |
| 3 + 2 | 5 |
| 5 + 0 | 5 |
| 9 + 7 | 16 |
| 2 + 5 | 7 |
| 9 + 2 | 11 |
| 1 + 3 | 4 |
| 6 + 3 | 9 |
| 8 + 7 | 15 |
| 2 + 4 | 6 |
| 6 + 7 | 13 |
| 8 + 1 | 9 |
| 4 + 2 | 6 |
| 1 + 9 | 10 |
| 0 + 3 | 3 |
| 8 + 3 | 11 |
| 1 + 9 | 10 |

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Let me know if you'd like this formatted as a printable PDF or need help explaining any specific problem!