CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
300 + 500 =
90 = 80 +
20 + 70 =
10 + 40 =
50 = 10 +
80 + 10 =
300 + 300 =
40 + 50 =
60 + 10 =
40 = 20 +
200 + 500 =
800 = 100 +
20 + 10 =
700 - 100 =
80 + 10 =
90 - 80 =
90 - 50 =
10 = 10 +
300 = 100 +
10 + 20 =