Răspuns:
5. 4c.....12i
X c.........27i =>X= 27×4/12= 108/12= 9 cutii
6.primul raft- 32 carti
al doilea= 32-7= 25 carti
al treilea: 25:5=5
In total,sunt: 32+25+5= 62 carti
7. 2 randuri a cate 3 trandafiri: 2×3=6
lalele: 6×4=24
gladiole: 6×6=36
In total,sunt: 6+24+36=66 flori.