CHRONO

10 s.

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

CHRONO

0 s.
331 - 12 =
349 + 8 =
683 - 11 =
804 + 9 =
840 + 8 =
513 + 12 =
176 + 9 =
799 + 9 =
413 - 8 =
803 - 12 =
804 + 11 =
318 + 8 =
983 - 12 =
409 - 8 =
323 - 12 =
95 + 12 =
130 - 8 =
952 + 9 =
785 + 8 =
378 - 9 =