CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
68 = 40 +
56 = 30 +
42 = 30 +
43 = 20 +
27 + 40 =
66 = 40 +
60 + 19 =
87 - 40 =
20 + 77 =
34 = 10 +
68 = 30 +
80 + 19 =
40 + 52 =
20 + 21 =
81 - 20 =
36 = 20 +
59 = 50 +
44 - 20 =
40 + 68 =
29 - 20 =