CHRONO

10 s.

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

CHRONO

0 s.
352 - 12 =
299 + 9 =
765 + 9 =
785 + 9 =
265 - 11 =
629 + 8 =
369 + 9 =
834 + 11 =
612 - 12 =
467 + 11 =
960 + 9 =
295 - 11 =
778 - 8 =
561 - 9 =
844 + 8 =
429 + 12 =
635 + 11 =
821 + 11 =
752 + 12 =
122 + 8 =