CHRONO

10 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
10 + 50 =
400 = 200 +
400 - 100 =
60 = 10 +
700 - 700 =
900 = 800 +
80 = 40 +
90 = 90 +
90 = 50 +
40 = 30 +
700 = 300 +
70 - 30 =
800 + 100 =
400 = 400 +
60 - 20 =
50 + 20 =
30 - 10 =
50 + 10 =
90 = 40 +
100 + 600 =