a) Tính (theo mẫu): Mẫu: 0 x 2 = dấu hỏi 0 x 2 = 0 + 0 = 0 0 x 2 = 0

a)

0 x 3 =?

0 x 3 = 0 + 0 + 0 = 3

0 x 3 = 0

0 x 4 =?

0 x 4 = 0 + 0 + 0 + 0 = 0

0 x 4 = 0

0 x 5 = ?

0 x 5 = 0 + 0 + 0 + 0 + 0 = 0

0 x 5 = 0

b)

0 x 6 = 0

0 : 6 = 0

0 x 7 = 0

0 : 7 = 0

0 x 8 = 0

0 : 8 = 0

0 x 9 = 0

0 : 9 = 0