Выполним вычисления.
- (28 + 12): 4 = 40: 4 = 10
- 57 – (37 – 15) = 57 - 22 = 35
- 100 – 90: 10 = 100 - 9 = 91
- 81: 9 + 42: 6 = 9 + 7 = 16
- 8 × 7 – 6 × 9 = 56 - 54 = 2
- 63: 9 + 72: 8 = 7 + 9 = 16
- 90 – 40: 10 = 90 - 4 = 86
- 14 + 56: 7 = 14 + 8 = 22
- 60 – 42 + 8 = 18 + 8 = 26
Ответ: 1) 10; 2) 35; 3) 91; 4) 16; 5) 2; 6) 16; 7) 86; 8) 22; 9) 26.