CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

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