CHRONO

10 s.

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

CHRONO

0 s.
134 - 9 =
585 + 11 =
526 + 8 =
156 - 11 =
963 + 8 =
858 + 8 =
834 + 8 =
971 + 11 =
253 - 12 =
285 - 8 =
793 + 9 =
245 - 12 =
706 + 9 =
631 + 12 =
949 - 11 =
179 + 8 =
426 - 9 =
703 + 9 =
798 + 11 =
511 + 11 =