CHRONO

54 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
46 + 40 =
58 - 50 =
93 = 20 +
41 = 20 +
14 + 40 =
32 = 30 +
43 = 20 +
47 + 30 =
40 + 22 =
50 + 14 =
30 + 77 =
30 + 59 =
20 + 45 =
20 + 89 =
30 + 33 =
66 + 10 =
27 + 30 =
74 = 40 +
83 - 60 =
71 - 10 =