CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
20 + 67 =
93 = 10 +
89 = 80 +
73 = 20 +
46 + 20 =
61 + 30 =
47 + 30 =
30 + 49 =
68 + 30 =
70 + 26 =
78 = 50 +
94 - 90 =
36 = 30 +
76 = 70 +
95 - 90 =
94 = 10 +
31 = 30 +
26 + 30 =
62 = 60 +
48 + 10 =