→ erau 37 porumbei si vrabiute
→au venit 12 porumbei
→ au venit 11 vrabiute
12 - 11 = 1 → numarul vrabiutelor initial era cu 1 mai mare decat al
porumbeilor
Plan
1) Cati porumbei si vrabiute sunt acum in copac?
37 + 12 + 11 = 60 porumbei si vrabiute sunt (acum) in copac
2) Cati porumbei si cate vrabiute sunt acum in mod egal in copac?
60 : 2 = 30 → numarul egal de porumbei si vrabiute existente acum in copac
3) Cati porumbei erau initial ( la inceput) in copac?
30 - 12 = 18 porumbei erau initial ( la inceput) in copac
4) Cate vrabiute erau la inceput in copac?
30 - 11 = 19 vrabiute erau initial in copac
Verific: 18 + 19 = 37 porumbei si vrabiute
Raspuns: 18 porumbei si 19 vrabiute
