CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
87 - 20 =
60 + 36 =
41 = 10 +
18 + 50 =
16 + 80 =
10 + 83 =
42 + 50 =
53 + 10 =
55 - 50 =
40 + 65 =
58 = 10 +
63 - 20 =
17 = 10 +
66 - 20 =
91 - 70 =
62 = 50 +
98 = 90 +
82 + 10 =
52 + 30 =
44 + 40 =