CHRONO

10 s.

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

CHRONO

0 s.
189 + 12 =
987 + 8 =
509 + 9 =
942 - 12 =
425 - 11 =
690 - 11 =
445 - 8 =
150 - 12 =
901 + 11 =
834 - 12 =
608 - 11 =
775 - 11 =
594 + 9 =
281 - 11 =
787 + 8 =
578 - 11 =
175 - 12 =
458 - 9 =
284 - 11 =
557 - 8 =