CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

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