CHRONO

3 s.

Calculer sur les multiples de 250.

CHRONO

0 s.
1500 - 1250 =
60 x 25 =
1500 = 1000 +
1250 = 1000 +
25 x 70 =
1250 = 250 +
2000 = 250 +
20 x 25 =
750 = 250 +
1750 - 1000 =
500 = 750 -
1000 - 500 =
1250 = 500 +
1000 = 250 x
2000 - 750 =
2000 - 500 =
2000 - 1000 =
750 = 500 +
1750 = 750 +
1000 = 2000 -