erau 37 de porumbei si vrabiute
au venit 12 porumbei si 11 vrabiute
12 - 11 = 1
→ numarul porumbeilor era cu 1 mai mic decat numarul vrabiutelor
1) Cate pasari sunt acum in total?
37 + 12 + 11 = 60 de porumbei si vrabiute
2) Cate vrabiute si cati porumbei sunt acum, in mod egal in copac?
60 : 2 = 30 porumbei
→ dar si 30 de vrabiute
3) Cati porumbei erau initial in copac?
30 - 12 = 18 porumbei erau initial
4) Cate vrabiute erau initial in copac?
30 - 11 = 19 vrabiute erau initial
Verific: 18 + 19 = 37 pasari erau initial
Raspuns: 18 porumbei si 19 vrabiute
