CHRONO

26 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
89 = 30 +
62 - 60 =
98 - 80 =
33 = 10 +
97 = 40 +
91 - 20 =
62 = 10 +
63 = 40 +
96 - 30 =
32 + 60 =
71 - 40 =
75 = 30 +
73 - 40 =
35 = 30 +
82 = 10 +
80 + 14 =
50 + 28 =
28 - 10 =
19 + 50 =
84 - 30 =