CHRONO

26 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
84 = 30 +
82 - 20 =
50 + 38 =
97 = 80 +
30 + 55 =
96 - 40 =
10 + 58 =
29 + 30 =
15 + 50 =
41 - 40 =
40 + 15 =
10 + 41 =
69 = 10 +
65 - 10 =
29 = 20 +
89 - 30 =
40 + 46 =
63 = 20 +
10 + 95 =
72 - 70 =