Question

Tính nhẩm:           

20 : 5                 15 : 5                 45 : 5                 10 : 5                 5 : 5

30 : 5                 25 : 5                 35 : 5                 50 : 5                 40 : 5

Answer 1

20 : 5 = 4              15 : 5 = 3              45 : 5 = 9              10 : 5 = 2              5 : 5 = 1

30 : 5 = 6              25 : 5 = 5              35 : 5 = 7              50 : 5 = 10            40 : 5 = 8