CHRONO

28 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
40 + 38 =
90 + 14 =
87 = 60 +
46 + 30 =
30 + 68 =
57 = 10 +
86 - 50 =
31 + 50 =
71 = 70 +
15 + 30 =
83 + 20 =
63 + 30 =
34 + 10 =
79 = 10 +
83 = 70 +
40 + 37 =
75 = 20 +
68 - 50 =
81 = 30 +
43 + 10 =