CHRONO

95 s.

Calculer sur les multiples de 250.

CHRONO

0 s.
20 x 25 =
500 = 250 +
1250 = 500 +
1000 = 2000 -
750 = 2000 -
2250 = 250 x
1250 = 1750 -
2250 = 1000 +
25 x 70 =
2000 = 250 +
2000 - 750 =
1750 = 1000 +
80 x 25 =
1250 = 2250 -
1000 - 750 =
1000 = 500 +
1000 - 250 =
10 x 25 =
1000 = 750 +
2000 = 750 +