а) \(\frac{1}{5}+\frac{1}{3}=\frac{8}{15}\); б) \(\frac{1}{2}+\frac{3}{8}=\frac{7}{8}\); в) \(\frac{3}{4}+2=2\frac{3}{4}\); г) \(\frac{2}{3}-\frac{1}{6}=\frac{1}{2}\); д) \(\frac{7}{12}-1=-\frac{5}{12}\); е) \(\frac{4}{5}-\frac{9}{10}=-\frac{1}{10}\); ё) \(\frac{1}{3}-\frac{1}{2}=-\frac{1}{6}\); ж) \(1+\frac{7}{3}=3\frac{1}{3}\); з) \(\frac{5}{4}-\frac{1}{3}=\frac{11}{12}\); и) \(3:2=1\frac{1}{2}\); й) \(-1:\frac{3}{4}=-\frac{4}{3}\); к) \(-\frac{7}{12}:(-\frac{1}{4})=\frac{7}{3}=2\frac{1}{3}\); л) \(\frac{1}{4}\cdot2=\frac{1}{2}\); м) \(-\frac{3}{4}\cdot\frac{4}{9}=-\frac{1}{3}\); н) \(\frac{7}{9}\cdot\frac{18}{35}=\frac{2}{5}\); о) \(-\frac{4}{19}\cdot(-\frac{57}{64})=\frac{3}{16}\); п) \(\frac{2}{3}+\frac{3}{4}=1\frac{5}{12}\); р) \(-\frac{4}{3}+\frac{7}{2}=2\frac{1}{6}\); с) \(\frac{4}{3}+\frac{1}{8}=1\frac{11}{24}\); т) \(-5\frac{2}{5}+4\frac{1}{3}=-1\frac{1}{15}\); у) \(6\frac{1}{2}-3\frac{3}{4}=2\frac{3}{4}\); ф) \(2\frac{1}{2}-\frac{7}{5}=1\frac{1}{10}\); х) \(-4\frac{2}{3}-\frac{7}{9}=-5\frac{4}{9}\); ц) \(-2\frac{2}{3}-3\frac{5}{9}=-6\frac{2}{9}\); ч) \(2\frac{3}{4}+3\frac{5}{7}=6\frac{13}{28}\); ш) \(-4\frac{5}{9}\cdot(-2\frac{6}{11})=12\frac{5}{11}\); щ) \(4\frac{1}{3}:3\frac{3}{17}=\frac{221}{180}\); ъ) \(-7\frac{3}{8}:(-2\frac{1}{16})=\frac{59}{4}=14\frac{3}{4}\); ы) \(\frac{3}{2}\cdot2\frac{2}{7}=\frac{24}{7}=3\frac{3}{7}\); ь) \(4\frac{1}{3}:2\frac{5}{6}=\frac{26}{17}\); э) \(-1\frac{1}{3}:3\frac{1}{6}=-\frac{8}{19}\); ю) \(4\frac{1}{5}:7\frac{1}{25}=\frac{15}{26}\).