CHRONO

10 s.

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

CHRONO

0 s.
12 x 400 =
12 x 20 =
20 x 7 =
11 x 200 =
400 x 1 =
7 x 20 =
200 x 9 =
7 x 400 =
40 x 9 =
40 x 1 =
400 x 3 =
40 x 10 =
4 x 400 =
6 x 400 =
200 x 4 =
4 x 1 =
400 x 8 =
3 x 4 =
20 x 5 =
8 x 400 =