CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

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