CHRONO

-INF s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
66 = 10 +
10 + 52 =
25 - 10 =
51 + 10 =
40 + 31 =
57 = 20 +
88 - 70 =
76 = 20 +
68 - 50 =
63 = 60 +
22 + 10 =
18 + 30 =
95 - 20 =
20 + 81 =
87 - 60 =
59 = 50 +
18 - 10 =
41 + 20 =
47 = 30 +
83 + 20 =