CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
40 - 30 =
500 - 300 =
600 - 300 =
80 - 40 =
50 = 30 +
200 - 100 =
400 = 400 +
100 + 200 =
400 + 300 =
60 + 30 =
30 + 10 =
80 = 10 +
100 + 400 =
100 + 400 =
200 = 100 +
600 = 100 +
50 = 50 +
600 + 100 =
50 = 40 +
50 + 40 =