CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
10 + 82 =
10 + 64 =
64 - 20 =
75 + 30 =
42 - 40 =
96 - 70 =
48 + 20 =
71 = 30 +
88 = 70 +
45 + 60 =
85 = 30 +
93 = 40 +
25 + 70 =
16 + 40 =
13 + 40 =
50 + 56 =
66 = 20 +
26 + 50 =
79 = 10 +
71 = 50 +