CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
10 + 36 =
10 + 21 =
70 + 38 =
18 + 40 =
73 = 50 +
30 + 18 =
20 + 79 =
41 + 10 =
91 = 10 +
48 = 30 +
94 = 50 +
59 + 50 =
28 + 30 =
10 + 34 =
48 + 10 =
69 + 30 =
47 + 10 =
10 + 18 =
33 + 20 =
13 + 60 =