CHRONO

54 s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

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