CHRONO

57 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
40 + 30 =
700 + 200 =
30 + 10 =
500 - 200 =
500 + 100 =
60 + 10 =
20 + 50 =
100 + 800 =
200 - 100 =
40 + 40 =
70 = 70 +
20 + 30 =
400 - 100 =
90 = 30 +
100 + 300 =
30 + 40 =
100 + 500 =
800 - 400 =
100 + 400 =
30 + 20 =