CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
700 = 100 +
900 = 100 +
400 = 100 +
900 - 700 =
500 - 200 =
80 = 60 +
10 + 70 =
60 - 10 =
20 + 20 =
40 + 50 =
60 = 40 +
70 = 50 +
20 + 30 =
70 = 70 +
80 = 70 +
20 + 40 =
600 - 500 =
60 - 20 =
70 + 20 =
90 - 60 =