CHRONO

10 s.

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

CHRONO

0 s.
574 - 12 =
366 + 12 =
864 + 12 =
46 + 11 =
555 + 8 =
778 - 12 =
615 + 8 =
235 - 12 =
578 - 9 =
136 + 12 =
349 - 8 =
423 - 8 =
131 - 11 =
335 - 9 =
699 + 12 =
958 - 9 =
62 + 9 =
792 - 12 =
627 - 9 =
808 - 12 =