Выполните деление. Пж помогите

0.9 : 1.8 = 9 : 18 = 0.5; 7.2 : 0.08 = 720 : 8 = 90; 0.84 : 4.2 = 8.4 : 42 = 0.2; 0.75 : 0.5 = 7.5 : 5 = 1.5; 2.4 : 0.6 = 24 : 6 = 4; 8.4 : 0.05 = 840 : 5 = 168; 0.16 : 0.4 = 1.6 : 4 = 0.4; 0.42 : 1.4 = 4.2 : 14 = 0.3;

1)0.5 2)90 3)0.2 4)1.5 5)4 7)0.4 8)0.3