Răspuns:
[tex]2\frac{3}{5} =\frac{2*5+3}{5} =\frac{13}{5} \\\\-5\frac{2}{7} =-\frac{37}{7} \\\\-1\frac{7}{9} =-\frac{16}{9} \\\\13\frac{5}{4} =\frac{13*4+5}{4} =\frac{57}{4} \\\\21\frac{5}{6} =\frac{131}{6}\\\\\\\frac{3}{2} =3:2=1 rest 1=1\frac{1}{2} \\\\\frac{11}{4} =2 rest 3=2\frac{3}{4} \\\\-\frac{13}{5} = -2\frac{3}{5} \\\\\frac{27}{11} = 2\frac{5}{11} \\\\-\frac{39}{13} =-3\\\\-\frac{48}{12} =-4\\\\\frac{79}{23} =3\frac{10}{23} \\\\\frac{205}{100} =\frac{41}{20} =2\frac{1}{20}[/tex]
