CHRONO

94 s.

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

CHRONO

0 s.
757 - 11 =
273 + 11 =
741 - 8 =
614 + 12 =
332 - 11 =
494 - 9 =
456 + 12 =
528 + 11 =
538 + 9 =
105 - 11 =
22 + 9 =
377 + 11 =
50 - 8 =
248 + 9 =
381 + 11 =
945 + 9 =
364 + 9 =
744 + 9 =
122 + 9 =
45 - 8 =