CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
16 + 90 =
40 + 26 =
60 + 48 =
78 = 50 +
22 + 20 =
89 = 70 +
31 + 40 =
53 = 40 +
21 + 60 =
80 + 23 =
12 + 90 =
61 + 30 =
46 - 30 =
19 + 50 =
16 + 30 =
84 - 30 =
92 = 30 +
11 + 30 =
10 + 13 =
17 + 90 =