CHRONO

-INF s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
60 = 20 x
1 x 50 =
6 x 20 =
4 x 50 =
100 = 50 x
50 = 1 x
2 x 20 =
50 x 9 =
20 x 2 =
300 = 6 x
40 = 2 x
80 = 20 x
9 x 50 =
50 = 50 x
400 = 8 x
100 = 20 x
450 = 50 x
50 x 5 =
300 = 50 x
6 x 50 =