Question

Rog ajutor in rezolvarea problemei

Answer 1

Metoda comparatiei:
7 paini...3 cozonaci...53 lei
2 paini...6 cozonaci...82 lei
Inmultim prima relatie cu 2 si obtinem:
14 paini...6 cozonaci...106 lei
2 paini...6 cozonaci...82 lei
1) Cate paini au fost cumparate in plus?
14-2=12 (paini in plus)
2) Cati lei s-au cheltuit in plus pt 12 paini?
106-82=24 (lei in plus)
3) Cat costa o paine?
24:12=2 ( lei o paine)
4) Cat costa 14 paini?
14×2=28 (lei 14 paini)
5) Cat costa 6 cozonaci?
106-28=78 (lei 6 cozonaci)
6) Cat costa 1 cozonac?
78:6=13 (lei 1 cozonac)
Verificare:
7×2+3×13=14+39=53 lei ( 7 paini si 3 cozonaci)