Выражения:
1) 79 – 19 ⋅ 2 + 34 – 75
78 : (64-58) = 79 – 38 + 34 – 75 : 78 : 6 = 41 + 34 – 12,5 : 6 = 75 – 2,08 = 72,92
2) 98 – 20 – 6 ⋅ 12 = 98 – 20 – 72 = 78 – 72 = 6
3) 9 ⋅ (42-37) = 9 ⋅ 5 = 45
4) 45 : 15 = 3
5) 90 : 24 = 3,75
Ответ: 72,92; 6; 45; 3; 3,75