CHRONO

54 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
99 = 90 +
20 + 24 =
80 + 11 =
70 + 22 =
35 = 30 +
38 - 30 =
95 = 60 +
86 - 40 =
92 = 20 +
94 = 10 +
16 + 90 =
61 = 10 +
31 + 70 =
52 + 10 =
99 = 60 +
41 + 20 =
50 + 19 =
30 + 72 =
74 = 60 +
94 - 30 =