CHRONO

10 s.

Calculs sur les dizaines.

CHRONO

0 s.
70 + 10 =
40 + 50 =
50 + 20 =
50 + 10 =
70 + 10 =
20 + 10 =
20 + 30 =
10 + 50 =
10 + 10 =
70 + 20 =
20 + 70 =
10 + 20 =
50 + 30 =
40 + 20 =
10 + 80 =
20 + 60 =
10 + 30 =
60 + 20 =
10 + 60 =
20 + 20 =