CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
120 = 20 x
450 = 50 x
160 = 20 x
400 = 8 x
20 = 20 x
200 = 4 x
50 x 4 =
20 x 9 =
180 = 9 x
80 = 20 x
150 = 50 x
6 x 20 =
100 = 50 x
50 = 50 x
350 = 50 x
60 = 20 x
350 = 7 x
400 = 50 x
50 = 1 x
50 x 5 =