CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
1 x 50 =
300 = 6 x
20 x 8 =
20 x 6 =
4 x 50 =
50 x 3 =
180 = 20 x
250 = 50 x
450 = 50 x
300 = 50 x
40 = 20 x
9 x 50 =
6 x 20 =
1 x 20 =
4 x 20 =
350 = 7 x
160 = 20 x
140 = 7 x
160 = 8 x
20 = 1 x