CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
45 = 30 +
20 + 14 =
36 + 30 =
39 - 30 =
61 + 30 =
69 = 20 +
30 + 34 =
73 = 20 +
28 = 20 +
50 + 24 =
93 = 60 +
61 + 40 =
47 - 10 =
74 - 40 =
30 + 67 =
93 - 30 =
40 + 49 =
88 = 10 +
50 + 33 =
26 + 70 =