Question

Tính:      

7 + 5                   8 + 6                      6 + 5

7 + 6                   9 + 6                      6 + 6

Answer 1

7 + 5 = 12                   8 + 6 = 14                   6 + 5 = 11

7 + 6 = 13                   9 + 6 = 15                   6 + 6 = 12