CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
66 + 20 =
47 + 10 =
45 - 20 =
40 + 36 =
10 + 24 =
10 + 55 =
39 + 10 =
43 - 10 =
10 + 46 =
10 + 28 =
93 - 60 =
30 + 35 =
44 + 40 =
62 = 60 +
49 + 30 =
99 - 20 =
33 + 70 =
73 = 40 +
66 - 30 =
53 + 20 =