CHRONO

2 s.

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

CHRONO

0 s.
433 - 11 =
123 + 12 =
754 + 9 =
493 + 12 =
87 + 11 =
911 - 11 =
469 - 12 =
900 - 11 =
46 - 9 =
393 + 11 =
42 + 8 =
757 - 9 =
771 + 11 =
727 + 8 =
178 + 12 =
906 + 11 =
533 - 9 =
817 - 12 =
564 - 9 =
626 + 8 =