CHRONO

41 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
90 - 60 =
30 + 10 =
400 + 200 =
10 + 80 =
500 + 400 =
900 - 700 =
80 - 10 =
10 + 50 =
100 + 500 =
60 = 40 +
900 = 800 +
30 + 50 =
40 + 50 =
50 - 40 =
70 = 40 +
100 + 300 =
10 + 70 =
40 + 10 =
800 = 600 +
400 - 400 =