CHRONO

10 s.

Ajouter et retrancher des nombres comme 8, 9, 11, 12.

CHRONO

0 s.
208 - 11 =
708 + 12 =
721 + 8 =
54 + 11 =
755 + 11 =
481 - 9 =
795 + 9 =
529 - 8 =
693 + 11 =
103 - 9 =
58 - 9 =
728 + 12 =
457 - 12 =
536 - 12 =
645 - 11 =
104 + 9 =
723 + 9 =
863 + 11 =
416 - 8 =
178 + 11 =