CHRONO

10 s.

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

CHRONO

0 s.
119 + 12 =
736 - 8 =
820 - 12 =
738 + 9 =
371 - 11 =
861 + 8 =
667 - 9 =
197 - 12 =
506 + 12 =
929 + 12 =
579 + 11 =
364 - 12 =
764 + 8 =
105 - 8 =
527 - 9 =
705 + 8 =
614 + 9 =
503 + 8 =
914 + 9 =
984 - 12 =