CHRONO

10 s.

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

CHRONO

0 s.
686 - 12 =
940 + 11 =
377 - 12 =
364 - 11 =
760 + 12 =
526 - 9 =
825 + 12 =
174 + 8 =
269 + 9 =
387 - 12 =
390 + 8 =
50 - 12 =
267 - 11 =
336 - 11 =
346 - 12 =
654 + 9 =
533 - 8 =
374 + 8 =
353 - 11 =
180 + 11 =