CHRONO

10 s.

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

CHRONO

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