CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
50 x 7 =
20 x 7 =
350 = 7 x
180 = 20 x
450 = 50 x
400 = 8 x
6 x 20 =
20 x 9 =
50 x 4 =
50 x 6 =
120 = 6 x
80 = 4 x
5 x 50 =
150 = 50 x
20 = 20 x
9 x 50 =
3 x 20 =
1 x 20 =
9 x 20 =
300 = 50 x