CHRONO

10 s.

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

CHRONO

0 s.
2 x 14 =
14 x 200 =
200 x 12 =
3 x 4 =
3 x 400 =
400 x 2 =
2 x 15 =
4 x 2 =
40 x 14 =
400 x 13 =
15 x 400 =
7 x 20 =
400 x 12 =
8 x 400 =
200 x 7 =
2 x 11 =
1 x 2 =
2 x 1 =
9 x 400 =
4 x 200 =