CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
26 + 60 =
20 + 35 =
26 + 10 =
79 = 40 +
25 + 20 =
30 + 67 =
63 + 10 =
17 + 70 =
78 - 70 =
71 + 10 =
62 = 20 +
25 - 20 =
41 - 30 =
20 + 15 =
55 = 50 +
46 + 30 =
48 + 10 =
98 - 70 =
16 + 80 =
80 + 25 =