CHRONO

10 s.

Calculer sur les multiples de 250.

CHRONO

0 s.
90 x 25 =
2000 - 1000 =
1250 = 2000 -
2250 = 250 x
500 = 2000 -
1500 = 500 +
1250 = 2250 -
750 = 1000 -
2250 = 2000 +
2250 - 1500 =
750 = 1750 -
60 x 25 =
25 x 20 =
2000 - 1500 =
2250 = 1500 +
500 = 750 -
1750 = 2000 -
750 = 250 x
25 x 60 =
1750 - 750 =