CHRONO

30 s.

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

CHRONO

0 s.
20 x 4 =
6 x 2 =
1 x 2 =
10 x 20 =
20 x 1 =
1 x 200 =
10 x 4 =
11 x 2 =
4 x 1 =
20 x 11 =
2 x 9 =
4 x 2 =
4 x 15 =
13 x 2 =
8 x 400 =
2 x 6 =
14 x 4 =
400 x 14 =
400 x 9 =
6 x 4 =