CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
51 + 10 =
61 + 40 =
78 - 40 =
30 + 74 =
28 + 60 =
95 = 80 +
19 + 60 =
84 = 70 +
19 + 20 =
55 - 30 =
35 + 30 =
30 + 52 =
61 = 30 +
24 - 10 =
82 = 60 +
61 = 20 +
40 + 28 =
80 + 11 =
31 - 20 =
67 - 20 =