CHRONO

10 s.

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

CHRONO

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