CHRONO

-INF s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
10 + 88 =
85 - 20 =
44 + 20 =
34 + 40 =
40 + 12 =
88 = 40 +
60 + 23 =
10 + 73 =
77 = 20 +
96 - 20 =
85 = 40 +
76 = 50 +
11 - 10 =
13 = 10 +
31 - 30 =
96 = 50 +
94 = 80 +
54 = 40 +
33 - 20 =
97 - 80 =