CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
24 + 10 =
21 + 10 =
58 - 30 =
40 + 53 =
76 - 20 =
51 + 10 =
50 + 45 =
68 - 50 =
65 - 50 =
44 = 20 +
10 + 54 =
93 = 20 +
40 + 56 =
63 + 20 =
40 + 42 =
37 - 10 =
85 - 40 =
96 = 10 +
11 + 90 =
55 = 50 +