CHRONO

10 s.

Ajouter ou soustraire des dizaines entières et compléments.

CHRONO

0 s.
86 = 60 +
26 + 20 =
92 = 20 +
73 = 50 +
30 + 79 =
88 = 50 +
60 + 38 =
43 + 50 =
69 - 40 =
40 + 36 =
40 + 25 =
78 + 10 =
12 + 70 =
33 + 60 =
25 + 30 =
45 + 40 =
33 + 20 =
20 + 21 =
98 = 40 +
40 + 66 =