CHRONO

10 s.

Calculer sur des nombres entiers de dizaines, de centaines ou de milliers.

CHRONO

0 s.
30 + 3000 + 900 =
700 + 2000 + 30 =
20 + 400 + 600 =
3000 + 800 + 10 =
400 + 7000 + 7000 =
200 + 500 + 1000 =
700 + 10 + 3000 =
400 + 600 + 200 =
70 + 90 + 8000 =
2000 + 1000 + 5000 =
300 + 500 + 20 =
70 + 4000 + 700 =
900 + 1000 + 80 =
20 + 400 + 8000 =
2000 + 90 + 900 =
70 + 40 + 10 =
200 + 90 + 80 =
900 + 500 + 10 =
20 + 200 + 5000 =
60 + 900 + 90 =