CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
20 + 87 =
45 + 20 =
70 + 37 =
30 + 18 =
83 - 80 =
40 + 23 =
76 + 20 =
66 + 20 =
10 + 22 =
92 - 60 =
70 + 36 =
73 + 10 =
71 + 10 =
86 - 80 =
87 = 60 +
18 + 70 =
40 + 65 =
39 + 70 =
47 - 30 =
58 - 40 =