CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
60 + 15 =
30 + 26 =
10 + 78 =
57 = 20 +
77 = 30 +
10 + 57 =
74 = 10 +
81 - 40 =
40 + 34 =
48 + 50 =
64 = 40 +
10 + 99 =
61 = 40 +
93 - 80 =
43 - 30 =
88 - 40 =
39 + 20 =
95 = 40 +
86 + 20 =
84 - 70 =