CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
100 + 600 =
50 - 30 =
80 - 20 =
900 = 500 +
90 = 90 +
10 + 80 =
30 + 30 =
200 + 100 =
600 - 100 =
90 - 40 =
400 + 100 =
50 - 10 =
20 + 10 =
300 + 100 =
600 - 600 =
10 + 70 =
900 = 200 +
30 + 20 =
80 - 10 =
800 - 700 =