CHRONO

-INF s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

0 s.
90 - 60 =
20 + 30 =
30 = 20 +
80 - 40 =
400 + 400 =
500 = 200 +
100 - 100 =
800 - 700 =
300 + 400 =
50 - 10 =
70 + 10 =
30 + 10 =
500 - 100 =
90 - 50 =
600 = 500 +
50 = 10 +
900 - 700 =
80 = 50 +
60 + 20 =
10 + 40 =