CHRONO

10 s.

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

CHRONO

0 s.
201 + 8 =
882 + 9 =
462 - 8 =
248 + 11 =
165 + 9 =
893 - 8 =
806 + 11 =
509 - 11 =
576 - 12 =
673 - 9 =
479 + 8 =
419 + 9 =
847 + 12 =
26 - 9 =
945 + 12 =
851 + 9 =
481 + 12 =
276 + 11 =
417 + 8 =
901 + 11 =