CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
60 + 10 =
700 = 400 +
100 + 300 =
300 + 100 =
300 + 500 =
30 + 50 =
30 + 30 =
100 - 100 =
80 + 10 =
40 = 40 +
200 - 100 =
10 = 10 +
80 - 50 =
200 + 100 =
600 = 400 +
500 + 100 =
30 + 20 =
60 - 30 =
60 = 10 +
300 - 300 =