CHRONO

10 s.

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

CHRONO

0 s.
637 + 9 =
959 - 9 =
292 + 9 =
982 + 9 =
424 - 12 =
566 + 12 =
387 + 11 =
531 - 8 =
111 + 9 =
413 + 12 =
302 - 8 =
345 - 11 =
813 - 11 =
504 + 11 =
941 - 11 =
673 - 11 =
849 - 12 =
877 - 8 =
591 - 8 =
186 - 11 =