Răspuns:
a) 57/10; 825/100; 3137/1000; 2323/100; 40508/100; 7/1000; 93308/1000; 40258/10000; 3429856/100000;
b)94/9; 2/3; 813/99; 1338/99; 49188/999; 10436/99;20467/99; 206497/999.
c)381/90; 4616/900; 9575/990; 114467/9900; 1092312/9990; 29949/99900; 2880697/999900.
