CHRONO

29 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
20 + 14 =
33 + 50 =
46 - 10 =
30 + 12 =
53 + 30 =
86 + 20 =
23 + 60 =
40 + 62 =
78 = 40 +
37 + 20 =
34 + 10 =
10 + 28 =
84 = 40 +
93 - 70 =
70 + 31 =
41 - 40 =
91 - 60 =
66 - 60 =
62 = 50 +
61 + 10 =