CHRONO

52 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
93 = 80 +
36 + 30 =
79 - 30 =
15 + 60 =
52 - 50 =
63 - 10 =
63 = 10 +
20 + 71 =
63 = 40 +
77 - 40 =
63 = 50 +
77 - 70 =
48 = 10 +
30 + 18 =
85 - 80 =
60 + 19 =
50 + 42 =
30 + 49 =
12 - 10 =
46 + 60 =