CHRONO

10 s.

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

CHRONO

0 s.
563 - 11 =
253 - 12 =
376 - 12 =
449 - 12 =
194 + 8 =
32 + 12 =
543 - 11 =
285 - 9 =
352 + 8 =
75 - 8 =
394 - 12 =
632 - 12 =
533 - 11 =
203 + 12 =
273 - 8 =
633 + 12 =
805 - 9 =
102 + 12 =
161 + 8 =
304 - 11 =