CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
96 - 30 =
38 + 40 =
52 = 10 +
85 - 80 =
86 - 30 =
30 + 39 =
95 = 10 +
96 - 10 =
10 + 93 =
97 - 10 =
80 + 16 =
30 + 54 =
62 = 60 +
89 - 80 =
85 - 50 =
10 + 47 =
87 - 30 =
78 + 10 =
31 + 20 =
60 + 42 =