Question

Tính:   

Mẫu: 3 × 6 = ?

         3 + 3 + 3 + 3 + 3 + 3 = 18

         3 × 6 = 18

a) 5 × 4                            b) 2 × 5

c) 8 × 2                            d) 3 × 3   

Answer 1

a) 5 × 4

   5 + 5 + 5 + 5 = 20

   5 × 4 = 20

b) 2 × 5

   2 + 2 + 2 + 2 + 2 = 10

   2 × 5 = 10

c) 8 × 2

   8 + 8 = 16

   8 × 2 = 16

d) 3 × 3

   3 + 3 + 3 = 9

   3 × 3 = 9

Answer 2

a) 5 x 4
5 + 5 + 5 + 5 = 20
5 x 4 = 20
b) 2 x 5
2 + 2 + 2 + 2 + 2 = 10
2 x 5 = 10
c) 8 x 2
8 + 8 = 16
8 x 2 = 16
d) 3 x 3 
3 + 3 + 3 = 9
3 x 3 = 9