CHRONO

10 s.

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

CHRONO

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