CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
60 + 33 =
65 + 20 =
50 + 22 =
28 + 60 =
50 + 26 =
18 + 90 =
87 = 70 +
58 - 20 =
84 = 30 +
56 = 10 +
78 - 10 =
49 + 50 =
28 + 40 =
28 = 10 +
10 + 61 =
10 + 76 =
50 + 28 =
48 - 40 =
84 - 30 =
76 - 70 =