a |-----b----||-----b----||-----b----||-----b----| 4 sticle
b |-----b----|...............6 lei.......................| o sticla, si diferenta
Iar se poate face in doua moduri
1 egalam
4b=b+6
4b-b=6
3b=6
b=6:3
b=2 lei o sticla
Sau
2. Ne luam dupa diferenta de pret
3 segmente=6 lei
1 segment=6:3
1segment=2 lei sticla