CHRONO

26 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
16 = 10 +
77 - 20 =
81 = 20 +
70 + 16 =
68 = 30 +
50 + 55 =
27 + 30 =
32 = 10 +
50 + 11 =
52 = 20 +
55 + 40 =
63 - 20 =
88 - 70 =
30 + 43 =
54 = 30 +
93 - 20 =
30 + 53 =
96 = 40 +
48 + 20 =
94 = 20 +