CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
70 + 14 =
78 = 30 +
21 + 60 =
87 - 80 =
30 + 66 =
39 + 60 =
30 + 56 =
46 = 40 +
60 + 36 =
90 + 19 =
11 + 80 =
89 = 10 +
93 - 20 =
79 = 20 +
79 + 20 =
98 - 20 =
14 + 20 =
94 - 90 =
88 = 20 +
40 + 69 =