To solve the problems on this worksheet, we need to add the decimal numbers in each column. When adding decimals, it’s important to line up the decimal points so that we are adding the correct place values (tenths with tenths, hundredths with hundredths, etc.).
Let’s go through each problem one by one:
1. 5.5 + 4.0
- Align decimals:
5.5
+ 4.0
-----
9.5
→ Answer: 9.5
2. 3.3 + 9.1
- Align decimals:
3.3
+ 9.1
-----
12.4
→ Answer: 12.4
3. 9.7 + 2.3
- Align decimals:
9.7
+ 2.3
-----
12.0
→ Answer: 12.0 (or just 12)
4. 1.0 + 4.9
- Align decimals:
1.0
+ 4.9
-----
5.9
→ Answer: 5.9
5. 6.7 + 7.3
- Align decimals:
6.7
+ 7.3
-----
14.0
→ Answer: 14.0 (or just 14)
6. 0.91 + 0.41
- Align decimals:
0.91
+ 0.41
------
1.32
→ Answer: 1.32
7. 9.5 + 7.1
- Align decimals:
9.5
+ 7.1
-----
16.6
→ Answer: 16.6
8. 4.8 + 0.1
- Align decimals:
4.8
+ 0.1
-----
4.9
→ Answer: 4.9
9. 0.71 + 0.02
- Align decimals:
0.71
+ 0.02
------
0.73
→ Answer: 0.73
10. 9.1 + 2.0
- Align decimals:
9.1
+ 2.0
-----
11.1
→ Answer: 11.1
11. 7.4 + 4.1
- Align decimals:
7.4
+ 4.1
-----
11.5
→ Answer: 11.5
12. 0.23 + 0.08
- Align decimals:
0.23
+ 0.08
------
0.31
→ Answer: 0.31
13. 6.6 + 2.1
- Align decimals:
6.6
+ 2.1
-----
8.7
→ Answer: 8.7
14. 7.8 + 0.8
- Align decimals:
7.8
+ 0.8
-----
8.6
→ Answer: 8.6
15. 3.9 + 6.0
- Align decimals:
3.9
+ 6.0
-----
9.9
→ Answer: 9.9
16. 8.5 + 1.5
- Align decimals:
8.5
+ 1.5
-----
10.0
→ Answer: 10.0 (or just 10)
17. 7.9 + 0.9
- Align decimals:
7.9
+ 0.9
-----
8.8
→ Answer: 8.8
18. 5.0 + 0.3
- Align decimals:
5.0
+ 0.3
-----
5.3
→ Answer: 5.3
19. 5.7 + 0.8
- Align decimals:
5.7
+ 0.8
-----
6.5
→ Answer: 6.5
20. 2.9 + 6.4
- Align decimals:
2.9
+ 6.4
-----
9.3
→ Answer: 9.3
Final Answer:
1. 9.5
2. 12.4
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
Parent Tip: Review the logic above to help your child master the concept of decimal worksheet grade 4.
