CHRONO

26 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
13 + 80 =
23 + 50 =
10 + 92 =
32 - 10 =
81 = 80 +
70 + 21 =
88 = 20 +
70 + 18 =
60 + 48 =
95 = 40 +
93 = 10 +
36 + 30 =
63 - 60 =
81 - 80 =
99 = 20 +
60 + 33 =
93 - 30 =
10 + 93 =
94 = 70 +
40 + 48 =