CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
50 x 3 =
3 x 20 =
20 x 6 =
120 = 6 x
100 = 50 x
20 x 4 =
80 = 20 x
450 = 9 x
20 x 1 =
60 = 20 x
50 x 5 =
20 = 20 x
20 = 1 x
2 x 50 =
5 x 20 =
4 x 20 =
7 x 20 =
6 x 20 =
50 = 1 x
180 = 20 x