CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
60 = 20 x
20 x 7 =
40 = 20 x
120 = 6 x
6 x 50 =
2 x 50 =
8 x 20 =
50 = 1 x
20 x 3 =
8 x 50 =
350 = 7 x
50 = 50 x
300 = 6 x
20 = 20 x
50 x 6 =
400 = 8 x
50 x 7 =
450 = 50 x
4 x 20 =
300 = 50 x