CHRONO

10 s.

Calculer sur les multiples de 250.

CHRONO

0 s.
500 = 1000 -
70 x 25 =
2250 = 750 +
1000 = 500 +
1000 = 250 +
1250 - 500 =
750 - 500 =
50 x 25 =
1000 = 2250 -
25 x 20 =
1000 = 1250 -
1000 = 750 +
25 x 60 =
2000 - 1000 =
25 x 30 =
40 x 25 =
25 x 50 =
2250 - 1000 =
250 = 500 -
1000 - 500 =