Metoda grafica
Alina l------l
George l------l------l } total = 348 castane
Diana l------l------l + 13
348 - 13 = 335 → suma celor 5 parti egale
1) Cate castane a cules Alina ?
335 : 5 = 67 castane a cules Alina
2) Cate castane a cules George ?
2 x 67 = 134 castane a cules George
3) Cate castane a cules Diana ?
134 + 13 = 147 castane a cules Diana
Verific: 67 + 134 + 147 = 348 castane au cules in total