CHRONO

10 s.

Multiplier un nombre simple par 20 ou 50.

CHRONO

0 s.
20 = 20 x
3 x 20 =
20 x 1 =
160 = 20 x
4 x 50 =
50 x 1 =
50 = 1 x
250 = 50 x
20 x 6 =
400 = 8 x
20 x 9 =
5 x 50 =
20 x 3 =
100 = 5 x
20 = 1 x
120 = 6 x
180 = 20 x
350 = 7 x
50 x 8 =
50 x 7 =