CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
64 - 40 =
95 = 90 +
88 - 50 =
96 = 90 +
74 = 30 +
97 = 50 +
72 + 20 =
94 - 40 =
73 - 40 =
77 + 20 =
60 + 23 =
12 + 90 =
75 + 10 =
86 - 50 =
69 - 60 =
87 = 20 +
11 + 30 =
62 = 30 +
71 = 50 +
30 + 45 =