CHRONO

10 s.

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

CHRONO

0 s.
409 - 9 =
20 - 11 =
764 - 9 =
824 - 9 =
342 + 8 =
371 + 11 =
609 + 11 =
908 + 8 =
355 + 12 =
702 - 12 =
446 - 11 =
494 - 12 =
34 - 11 =
703 + 9 =
375 + 11 =
406 + 12 =
540 + 11 =
982 + 8 =
677 + 12 =
437 + 11 =