CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
90 = 80 +
70 + 20 =
800 - 400 =
90 - 60 =
800 = 500 +
60 - 50 =
300 + 100 =
20 + 50 =
40 = 40 +
10 + 30 =
60 = 10 +
80 = 60 +
30 = 30 +
800 = 200 +
10 + 40 =
300 + 300 =
30 - 10 =
100 + 200 =
300 + 300 =
600 + 200 =