CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
100 = 2 x
450 = 9 x
350 = 50 x
20 x 8 =
20 x 6 =
20 x 1 =
9 x 20 =
400 = 50 x
120 = 20 x
60 = 3 x
5 x 20 =
120 = 6 x
180 = 20 x
40 = 2 x
20 x 3 =
5 x 50 =
40 = 20 x
8 x 50 =
150 = 50 x
3 x 20 =