Let's solve each of the decimal addition problems in the worksheet step by step. The goal is to add decimals correctly by aligning the decimal points and adding column by column, just like regular addition.
---
1. 5.5 + 4.0
```
5.5
+ 4.0
-----
9.5
```
Answer: 9.5
---
2. 3.3 + 8.1
```
3.3
+ 8.1
-----
11.4
```
Answer: 11.4
---
3. 9.7 + 2.3
```
9.7
+ 2.3
-----
12.0
```
Answer: 12.0
---
4. 1.0 + 4.9
```
1.0
+ 4.9
-----
5.9
```
Answer: 5.9
---
5. 6.7 + 7.3
```
6.7
+ 7.3
-----
14.0
```
Answer: 14.0
---
6. 0.91 + 0.41
```
0.91
+ 0.41
------
1.32
```
Answer: 1.32
---
7. 9.5 + 7.1
```
9.5
+ 7.1
-----
16.6
```
Answer: 16.6
---
8. 4.8 + 0.1
```
4.8
+ 0.1
-----
4.9
```
Answer: 4.9
---
9. 0.71 + 0.02
```
0.71
+ 0.02
------
0.73
```
Answer: 0.73
---
10. 9.1 + 2.0
```
9.1
+ 2.0
-----
11.1
```
Answer: 11.1
---
11. 7.4 + 4.1
```
7.4
+ 4.1
-----
11.5
```
Answer: 11.5
---
12. 0.23 + 0.08
```
0.23
+ 0.08
------
0.31
```
Answer: 0.31
---
13. 6.6 + 2.1
```
6.6
+ 2.1
-----
8.7
```
Answer: 8.7
---
14. 7.8 + 0.8
```
7.8
+ 0.8
-----
8.6
```
Answer: 8.6
---
15. 3.9 + 6.0
```
3.9
+ 6.0
-----
9.9
```
Answer: 9.9
---
16. 8.5 + 1.5
```
8.5
+ 1.5
-----
10.0
```
Answer: 10.0
---
17. 7.9 + 0.9
```
7.9
+ 0.9
-----
8.8
```
Answer: 8.8
---
18. 5.0 + 0.3
```
5.0
+ 0.3
-----
5.3
```
Answer: 5.3
---
19. 5.7 + 0.8
```
5.7
+ 0.8
-----
6.5
```
Answer: 6.5
---
20. 2.9 + 6.4
```
2.9
+ 6.4
-----
9.3
```
Answer: 9.3
---
✔ Final Answers:
1. 9.5
2. 11.4
3. 12.0
4. 5.9
5. 14.0
6. 1.32
7. 16.6
8. 4.9
9. 0.73
10. 11.1
11. 11.5
12. 0.31
13. 8.7
14. 8.6
15. 9.9
16. 10.0
17. 8.8
18. 5.3
19. 6.5
20. 9.3
---
🔍 Tips for Adding Decimals:
- Always
align the decimal points vertically.
- Add zeros if needed to make numbers the same length (e.g., 5.5 becomes 5.50).
- Add column by column from right to left.
- Place the decimal point in the answer directly below the others.
Let me know if you'd like this as a printable PDF or with visual steps!
Parent Tip: Review the logic above to help your child master the concept of decimal worksheets 4th grade.
