Răspuns :
a |-----|-----|-----|-----|-----|
b |-----|
500 : 4 = 125 (b)
125 x 5 = 625 (a)
Proba : 625 - 125 = 500
b |-----|
500 : 4 = 125 (b)
125 x 5 = 625 (a)
Proba : 625 - 125 = 500