Решение:
а) 3 * 1.6 - 1.2 : 12 + 1.2 = 4.8 - 0.1 + 1.2 = 4.7 + 1.2 = 5.9
б) 0.6 * 6 + 1.2 : 40 : 50 = 3.6 + 0.03 : 50 = 3.6 + 0.0006 = 3.6006
в) 30 * 0.3 - 4.8 : 0.7 * 0.01 = 9 - 6.857 * 0.01 = 9 - 0.06857 ≈ 8.931
г) 2 * 1.9 - 2.2 : 0.8 : 0.1 = 3.8 - 2.75 : 0.1 = 3.8 - 27.5 = -23.7
д) 7 - 0.7 : 0.9 - 0.02 + 0.66 = 7 - 0.777 - 0.02 + 0.66 = 6.223 - 0.02 + 0.66 = 6.203 + 0.66 = 6.863
е) 1.5 * 6 : 5 : 2 + 2.4 = 9 : 5 : 2 + 2.4 = 1.8 : 2 + 2.4 = 0.9 + 2.4 = 3.3