CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
86 = 80 +
52 + 50 =
51 - 50 =
65 = 50 +
33 + 50 =
40 + 34 =
75 - 70 =
30 + 51 =
53 - 50 =
20 + 55 =
39 = 30 +
28 + 60 =
65 + 30 =
86 = 70 +
55 - 20 =
20 + 64 =
60 + 31 =
44 = 40 +
50 + 38 =
50 + 33 =