CHRONO

10 s.

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

CHRONO

0 s.
4 x 40 =
13 x 2 =
40 x 10 =
40 x 14 =
5 x 400 =
400 x 5 =
10 x 200 =
8 x 40 =
13 x 20 =
8 x 2 =
200 x 2 =
20 x 10 =
4 x 11 =
400 x 7 =
12 x 40 =
4 x 4 =
4 x 15 =
14 x 20 =
20 x 15 =
5 x 20 =