CHRONO

30 s.

Calculer des produits par 2, 20, 200, 4, 40, 400.

CHRONO

0 s.
1 x 4 =
40 x 8 =
13 x 20 =
2 x 10 =
40 x 7 =
7 x 4 =
200 x 14 =
13 x 400 =
9 x 40 =
10 x 4 =
400 x 10 =
12 x 400 =
2 x 2 =
10 x 400 =
12 x 40 =
8 x 200 =
20 x 7 =
200 x 13 =
40 x 15 =
20 x 3 =