CHRONO

11 s.

Ajouter ou retrancher un nombre du type 10, 200...

CHRONO

0 s.
105 - 20 =
160 + 20 =
687 - 300 =
158 + 40 =
373 + 400 =
488 + 40 =
27 + 300 =
379 - 60 =
213 + 300 =
168 + 60 =
406 + 20 =
407 - 40 =
458 + 30 =
294 + 300 =
296 - 30 =
185 - 80 =
428 + 400 =
246 - 60 =
96 + 30 =
299 + 30 =