CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
42 + 40 =
14 + 60 =
86 = 80 +
60 + 41 =
10 + 95 =
44 = 40 +
42 = 40 +
20 + 22 =
71 = 40 +
58 + 30 =
49 - 10 =
49 - 20 =
30 + 39 =
52 - 50 =
48 = 40 +
77 = 20 +
27 = 10 +
84 = 30 +
93 - 50 =
48 + 10 =