1. 400:2=200(bilete vandute la pranz)
200+110=310(bilete vandute dupa amiaza)
400+200+310=600+310=
=910(bilete vandute in total)
920-910=10(bilete mai trebuie vandute)
2. 4 zile=534km
prima zi=134km
134+66=200(km a doua zi)
534-134-200=200
200:2=100(km parcurge in a 3-a)
200:2=100(km parcurge in a 4-a zi)