CHRONO

2 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
79 + 20 =
94 = 30 +
55 + 50 =
71 = 60 +
24 + 40 =
33 = 10 +
14 - 10 =
84 = 80 +
90 + 13 =
88 + 10 =
10 + 52 =
50 + 17 =
10 + 78 =
10 + 21 =
56 = 50 +
78 = 70 +
28 + 60 =
12 + 80 =
27 = 10 +
39 + 40 =