CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
30 + 54 =
60 + 45 =
92 - 50 =
21 - 10 =
40 + 39 =
98 - 80 =
75 = 10 +
70 + 16 =
50 + 53 =
10 + 61 =
95 - 50 =
85 - 20 =
40 + 56 =
66 = 40 +
75 = 30 +
23 = 20 +
23 + 10 =
90 + 12 =
10 + 41 =
95 + 10 =