CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
100 + 800 =
400 + 300 =
800 - 700 =
90 = 40 +
900 = 200 +
10 + 40 =
300 + 400 =
90 = 80 +
500 - 500 =
30 = 10 +
20 + 50 =
400 - 200 =
30 + 10 =
200 + 600 =
20 + 40 =
40 = 30 +
90 - 60 =
80 - 20 =
200 + 200 =
500 + 100 =