CHRONO

26 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
52 - 50 =
59 = 30 +
60 + 39 =
10 + 77 =
62 = 40 +
20 + 41 =
82 + 20 =
38 + 40 =
39 + 30 =
70 + 39 =
76 - 10 =
60 + 11 =
84 = 40 +
30 + 28 =
26 + 50 =
82 - 80 =
68 = 40 +
43 = 20 +
47 = 40 +
30 + 42 =