I3
Пошаговое объяснение:
1. 78+17-28= 77
78+17=95
95- 28=77
2. 76-(32-18)= 62
32-18= 14
76- 14=62
3. 36+(73-56)= 59
74-56=18
36+18= 59
4. 53-(17+28)=8
17+28= 45
53-45= 8
5. 92-(35+28)=85
35+28= 7
92-7=85
6. 92-35-28= 14
92-35=42
42-28=14
