1.
5 caiete+4 carti=52 lei | x2
10 caiete+2 carti=56 lei
____________________
10 caiete+8 carti =104 lei
10 caiete+2 carti=56 lei
___________________
6 carti = 48 lei
1 carte = 48 : 6=8 lei
10 caiete + 16 lei = 56 lei
10 caiete = 56-16=40
1 caiet = 40:10=4 lei
2.
|_______________________________________| SUMA DE BANI
|____________________| EXCURSIE 1/2
|______|______|______|
1/3 CARTE |______|
|---------50---------|
50:2=25
1 carte=25 lei
25 x3 = 75
excursia = 75 lei
75 x 2 = 150 lei a avut initial