CHRONO

10 s.

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

CHRONO

0 s.
534 - 12 =
122 + 9 =
370 - 8 =
274 + 11 =
195 + 12 =
337 + 11 =
138 + 8 =
423 - 11 =
135 + 11 =
391 - 11 =
723 + 8 =
796 + 12 =
90 + 12 =
188 + 8 =
601 - 9 =
578 - 9 =
172 + 12 =
411 - 9 =
927 + 9 =
368 + 11 =