Răspuns :
a |-----|
b |-----|-----|-----|-----| } 50
50 : 5 = 10 (a)
10 × 4 = 40 (b)
Proba : 10 + 40 = 50 .
b |-----|-----|-----|-----| } 50
50 : 5 = 10 (a)
10 × 4 = 40 (b)
Proba : 10 + 40 = 50 .