Răspuns :
a |-----|-----|-----|-----|-----|
b |-----|
800 : 4 = 200 ( b)
200 × 5 = 1000 (a)
Proba : 1000 - 200 = 800.
b |-----|
800 : 4 = 200 ( b)
200 × 5 = 1000 (a)
Proba : 1000 - 200 = 800.