Addition and Subtraction of Decimals worksheet with 15 problems for practice.

Let’s solve each of the 15 decimal addition and subtraction problems one by one. I’ll line up the decimals carefully, add or subtract as needed, and double-check each answer.

---

Problem 1: 29.36 + 33.79

Align decimals:
```
29.36
+ 33.79
-------
63.15
```

✔ Check: 29 + 33 = 62; 0.36 + 0.79 = 1.15 → 62 + 1.15 = 63.15 ✔️

---

Problem 2: 98.30 - 31.27

Align decimals:
```
98.30
- 31.27
-------
67.03
```

✔ Check: 98.30 - 31 = 67.30; then subtract 0.27 → 67.30 - 0.27 = 67.03 ✔️

---

Problem 3: 97.44 + 81.82

Align decimals:
```
97.44
+ 81.82
-------
179.26
```

✔ Check: 97 + 81 = 178; 0.44 + 0.82 = 1.26 → 178 + 1.26 = 179.26 ✔️

---

Problem 4: 22.10 - 19.08

Align decimals:
```
22.10
- 19.08
-------
3.02
```

✔ Check: 22.10 - 19 = 3.10; then subtract 0.08 → 3.10 - 0.08 = 3.02 ✔️

---

Problem 5: 257.307 - 37.996

Align decimals (all have 3 decimal places):
```
257.307
- 37.996
--------
219.311
```

✔ Check: 257.307 - 37 = 220.307; then subtract 0.996 → 220.307 - 0.996 = 219.311 ✔️

---

Problem 6: 96.344 + 2.667

Align decimals:
```
96.344
+ 2.667
--------
99.011
```

✔ Check: 96 + 2 = 98; 0.344 + 0.667 = 1.011 → 98 + 1.011 = 99.011 ✔️

---

Problem 7: 88.44 - 79.13

Align decimals:
```
88.44
- 79.13
-------
9.31
```

✔ Check: 88.44 - 79 = 9.44; then subtract 0.13 → 9.44 - 0.13 = 9.31 ✔️

---

Problem 8: 12.92 + 33.61

Align decimals:
```
12.92
+ 33.61
-------
46.53
```

✔ Check: 12 + 33 = 45; 0.92 + 0.61 = 1.53 → 45 + 1.53 = 46.53 ✔️

---

Problem 9: 122.79 + 55.79

Align decimals:
```
122.79
+ 55.79
-------
178.58
```

✔ Check: 122 + 55 = 177; 0.79 + 0.79 = 1.58 → 177 + 1.58 = 178.58 ✔️

---

Problem 10: 20.178 - 3.122

Align decimals:
```
20.178
- 3.122
--------
17.056
```

✔ Check: 20.178 - 3 = 17.178; then subtract 0.122 → 17.178 - 0.122 = 17.056 ✔️

---

Problem 11: 1.27 - 0.19

Align decimals:
```
1.27
- 0.19
-------
1.08
```

✔ Check: 1.27 - 0.10 = 1.17; then subtract 0.09 → 1.17 - 0.09 = 1.08 ✔️

---

Problem 12: 81.03 + 33.79

Align decimals:
```
81.03
+ 33.79
-------
114.82
```

✔ Check: 81 + 33 = 114; 0.03 + 0.79 = 0.82 → 114 + 0.82 = 114.82 ✔️

---

Problem 13: 119.19 - 109.10

Align decimals:
```
119.19
-109.10
-------
10.09
```

✔ Check: 119.19 - 109 = 10.19; then subtract 0.10 → 10.19 - 0.10 = 10.09 ✔️

---

Problem 14: 1918.19 - 1819.17

Align decimals:
```
1918.19
-1819.17
--------
99.02
```

✔ Check: 1918.19 - 1819 = 99.19; then subtract 0.17 → 99.19 - 0.17 = 99.02 ✔️

---

Problem 15: 0.27 + 9.12

Align decimals:
```
0.27
+ 9.12
-------
9.39
```

✔ Check: 0 + 9 = 9; 0.27 + 0.12 = 0.39 → 9 + 0.39 = 9.39 ✔️

---

Final Answer:
1. 63.15
2. 67.03
3. 179.26
4. 3.02
5. 219.311
6. 99.011
7. 9.31
8. 46.53
9. 178.58
10. 17.056
11. 1.08
12. 114.82
13. 10.09
14. 99.02
15. 9.39