CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
51 = 50 +
46 + 50 =
30 + 69 =
91 = 50 +
56 = 40 +
75 = 70 +
70 + 14 =
75 - 40 =
89 - 40 =
85 = 60 +
96 = 70 +
21 + 70 =
55 + 50 =
62 + 10 =
70 + 13 =
94 - 60 =
67 = 40 +
20 + 13 =
79 + 10 =
92 - 80 =