CHRONO

-INF s.

Calculs sur les dizaines ou des centaines entières.

CHRONO

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