CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
80 - 70 =
200 + 100 =
800 + 100 =
30 - 10 =
30 + 10 =
90 = 90 +
500 = 100 +
800 = 200 +
30 + 40 =
300 = 100 +
10 + 80 =
900 = 400 +
500 - 100 =
100 - 100 =
50 = 40 +
60 + 10 =
50 = 50 +
20 + 10 =
600 - 400 =
100 + 500 =