CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
50 + 25 =
96 - 10 =
55 + 20 =
33 + 40 =
99 = 50 +
18 + 50 =
71 = 50 +
14 + 40 =
13 = 10 +
92 = 30 +
91 + 10 =
65 + 40 =
44 + 40 =
59 + 10 =
92 = 10 +
64 + 30 =
53 = 20 +
30 + 59 =
64 = 50 +
20 + 87 =