CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
69 + 40 =
39 = 20 +
67 + 20 =
94 - 50 =
74 - 20 =
23 = 10 +
82 - 40 =
70 + 18 =
10 + 55 =
97 = 30 +
40 + 22 =
70 + 19 =
34 + 10 =
94 - 80 =
73 - 70 =
30 + 22 =
74 = 50 +
94 = 30 +
83 - 70 =
73 + 10 =