CHRONO

10 s.

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

CHRONO

0 s.
4 x 7 =
7 x 40 =
7 x 400 =
200 x 5 =
200 x 9 =
20 x 2 =
200 x 10 =
200 x 14 =
200 x 1 =
20 x 13 =
10 x 200 =
1 x 4 =
40 x 3 =
40 x 2 =
1 x 2 =
10 x 4 =
200 x 15 =
2 x 11 =
1 x 40 =
40 x 5 =