CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
10 + 24 =
99 - 70 =
63 - 30 =
86 - 70 =
93 - 30 =
46 + 50 =
19 + 20 =
10 + 52 =
68 + 40 =
91 - 80 =
70 + 33 =
78 - 70 =
28 = 20 +
51 - 20 =
71 = 60 +
33 = 30 +
10 + 66 =
20 + 84 =
30 + 47 =
18 + 60 =