CHRONO

10 s.

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

CHRONO

0 s.
434 + 9 =
288 + 11 =
563 + 11 =
328 + 8 =
845 - 8 =
174 + 9 =
735 + 9 =
90 - 8 =
633 + 11 =
450 - 12 =
505 + 9 =
605 + 12 =
669 - 9 =
709 + 9 =
580 + 11 =
534 - 9 =
388 + 8 =
601 - 8 =
138 - 8 =
783 + 11 =