CHRONO

10 s.

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

CHRONO

0 s.
392 - 11 =
821 - 12 =
116 - 9 =
477 - 9 =
834 - 8 =
753 + 12 =
391 + 11 =
542 + 11 =
359 - 11 =
69 - 11 =
34 + 9 =
974 + 8 =
296 - 12 =
596 - 11 =
462 + 9 =
574 + 11 =
225 - 9 =
535 - 12 =
547 - 9 =
541 + 9 =