Ответ:\(90 : 30 = 3\); \(40 : 40 = 1\); \(90 : 9 = 10\).\(100 : 10 = 10\); \(90 : 10 = 9\); \(80 : 20 = 4\).\(20 : 2 \times 4 = 10 \times 4 = 40\).\(60 : 30 \times 5 = 2 \times 5 = 10\).\(60 : 20 \times 9 = 3 \times 9 = 27\).