CHRONO

10 s.

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

CHRONO

0 s.
493 - 12 =
855 + 12 =
776 + 8 =
403 - 11 =
502 + 12 =
641 + 11 =
136 - 12 =
131 + 11 =
162 + 11 =
257 - 8 =
658 + 8 =
116 + 8 =
364 + 9 =
176 + 8 =
730 + 12 =
104 - 9 =
610 - 8 =
723 + 12 =
439 + 9 =
964 - 8 =