Le sens de la multiplication et tables de multiplication de 2 et de 4 (18 mai)

Table  × 2          Les doubles

2 × 1 = 1 × 2 = 2

2 × 2 = 4

2 × 3 = 3 × 2  = 6

2 × 4 = 4 × 2 = 8

2 × 5 = 5 × 2 = 10

2 × 6 = 6 × 2 = 12

2 × 7 = 7 × 2 = 14

 2 × 8 = 8  × 2 = 16

2 × 9 = 9  × 2 = 18

2 × 10 = 10 × 2 = 20