CHRONO

-INF s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
87 = 40 +
43 = 20 +
42 + 50 =
46 = 20 +
24 + 70 =
56 - 30 =
89 - 10 =
91 = 90 +
55 + 10 =
81 - 50 =
30 + 29 =
40 + 12 =
12 + 70 =
29 - 10 =
58 = 50 +
47 = 40 +
87 - 50 =
50 + 17 =
42 + 10 =
68 + 20 =