Răspuns :
a |-----|-----|-----|
b |-----|
100 : 2 = 50 (b)
50 x 3 = 150 (a)
Proba : 150 - 50 = 100.
b |-----|
100 : 2 = 50 (b)
50 x 3 = 150 (a)
Proba : 150 - 50 = 100.