CHRONO

89 s.

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

CHRONO

0 s.
779 - 11 =
738 - 8 =
818 + 11 =
784 - 11 =
825 - 9 =
137 - 8 =
180 + 12 =
213 - 8 =
455 + 9 =
775 + 11 =
969 - 9 =
984 - 11 =
649 + 8 =
118 - 11 =
707 + 11 =
689 - 9 =
220 - 11 =
836 + 12 =
394 + 11 =
266 - 11 =