Sure! Let’s solve each decimal addition problem step by step. The key to adding decimals is to
line up the decimal points and add as you would with whole numbers, carrying over when necessary.
---
Left Column:
1.
45.3 + 9.9
→ Align decimals:
```
45.3
+ 9.9
------
55.2
```
✔ Answer: 55.2
2.
6.7 + 39.7
```
6.7
+39.7
-----
46.4
```
✔ Answer: 46.4
3.
16.8 + 17.5
```
16.8
+17.5
-----
34.3
```
✔ Answer: 34.3
4.
9.2 + 8.8
```
9.2
+ 8.8
-----
18.0 (or just 18)
```
✔ Answer: 18.0
5.
16.3 + 18.8
```
16.3
+18.8
-----
35.1
```
✔ Answer: 35.1
6.
2.53 + 4.5
→ Write 4.5 as 4.50 to align decimals:
```
2.53
+ 4.50
------
7.03
```
✔ Answer: 7.03
7.
95.6 + 8.64
→ Write 95.6 as 95.60:
```
95.60
+ 8.64
-------
104.24
```
✔ Answer: 104.24
8.
17.7 + 22.3
```
17.7
+22.3
-----
40.0
```
✔ Answer: 40.0
9.
8.95 + 9.2
→ Write 9.2 as 9.20:
```
8.95
+ 9.20
------
18.15
```
✔ Answer: 18.15
10.
6.3 + 7.55
→ Write 6.3 as 6.30:
```
6.30
+ 7.55
------
13.85
```
✔ Answer: 13.85
---
Right Column:
1.
9.63 + 2.88
```
9.63
+ 2.88
------
12.51
```
✔ Answer: 12.51
2.
5.74 + 9.9
→ Write 9.9 as 9.90:
```
5.74
+ 9.90
------
15.64
```
✔ Answer: 15.64
3.
4.12 + 6.31
```
4.12
+ 6.31
------
10.43
```
✔ Answer: 10.43
4.
92.3 + 9.32
→ Write 92.3 as 92.30:
```
92.30
+ 9.32
-------
101.62
```
✔ Answer: 101.62
5.
74.3 + 83.5
```
74.3
+83.5
-----
157.8
```
✔ Answer: 157.8
6.
4.21 + 9.6
→ Write 9.6 as 9.60:
```
4.21
+ 9.60
------
13.81
```
✔ Answer: 13.81
7.
47.3 + 52.9
```
47.3
+52.9
-----
100.2
```
✔ Answer: 100.2
8.
45.4 + 8.6
```
45.4
+ 8.6
-----
54.0
```
✔ Answer: 54.0
9.
36.2 + 4.78
→ Write 36.2 as 36.20:
```
36.20
+ 4.78
-------
40.98
```
✔ Answer: 40.98
10.
6.63 + 82.1
→ Write 82.1 as 82.10:
```
6.63
+82.10
------
88.73
```
✔ Answer: 88.73
---
##
✔ Final Answers:
Left Column:
1. 55.2
2. 46.4
3. 34.3
4. 18.0
5. 35.1
6. 7.03
7. 104.24
8. 40.0
9. 18.15
10. 13.85
Right Column:
1. 12.51
2. 15.64
3. 10.43
4. 101.62
5. 157.8
6. 13.81
7. 100.2
8. 54.0
9. 40.98
10. 88.73
---
✔ You can now fill in your worksheet with these correct answers!
Let me know if you’d like to see a visual alignment or need help with subtraction too!
Parent Tip: Review the logic above to help your child master the concept of fifth math worksheet.
