CHRONO

10 s.

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

CHRONO

0 s.
795 - 8 =
668 + 9 =
291 + 9 =
301 + 12 =
167 + 8 =
459 - 11 =
732 + 12 =
66 + 12 =
656 + 12 =
51 + 8 =
558 + 8 =
789 + 12 =
808 + 12 =
450 - 11 =
332 - 8 =
627 - 8 =
681 + 9 =
837 + 11 =
87 - 8 =
290 + 9 =