CHRONO

2 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
32 + 50 =
72 = 70 +
88 - 70 =
17 + 90 =
29 = 20 +
50 + 54 =
45 + 60 =
66 - 20 =
10 + 28 =
20 + 55 =
43 = 10 +
20 + 13 =
95 - 70 =
92 + 10 =
98 = 90 +
20 + 32 =
19 + 50 =
93 - 10 =
50 + 47 =
45 + 50 =