CHRONO

54 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
84 - 50 =
33 + 20 =
63 + 20 =
40 + 22 =
95 = 10 +
10 + 16 =
82 + 10 =
50 + 48 =
87 - 30 =
77 = 50 +
50 + 51 =
83 = 80 +
68 - 60 =
87 - 50 =
85 = 40 +
83 = 10 +
60 + 42 =
10 + 68 =
34 + 20 =
13 + 10 =