CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
89 + 10 =
14 + 80 =
32 = 10 +
87 - 40 =
34 + 30 =
77 - 20 =
70 + 27 =
10 + 76 =
39 + 60 =
83 + 20 =
10 + 19 =
89 = 60 +
91 - 70 =
66 + 30 =
17 - 10 =
30 + 37 =
54 + 50 =
75 - 40 =
34 + 20 =
16 = 10 +