CHRONO

10 s.

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

CHRONO

0 s.
772 - 11 =
195 + 12 =
854 + 12 =
355 - 8 =
61 - 12 =
223 - 11 =
708 + 11 =
358 + 12 =
910 - 8 =
922 - 9 =
898 + 9 =
259 - 11 =
444 - 11 =
264 - 12 =
131 - 11 =
564 + 11 =
157 + 12 =
628 + 11 =
90 - 12 =
231 + 9 =