CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
10 + 86 =
89 + 10 =
10 + 12 =
26 - 10 =
70 + 16 =
10 + 65 =
44 + 60 =
89 = 30 +
29 - 20 =
10 + 21 =
54 + 30 =
56 - 50 =
66 = 10 +
79 - 30 =
65 = 10 +
89 + 20 =
50 + 37 =
11 + 80 =
75 = 40 +
87 = 50 +