Răspuns:
1. 9000 l + 700 l =9700 l
2. 40 l + 4 l = 44 l
3. 400 l + 40 l = 440 l
4. 200 l + 70 l = 270 l
5. 5000 l + 30 l = 5030 l
6. 60 l + 7 l = 67 l