Ответ: Выполнено сложение, вычитание, умножение и деление обыкновенных дробей и дробей на целые числа.
\[\frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}\]
\[\frac{2}{5} + \frac{1}{4} = \frac{8}{20} + \frac{5}{20} = \frac{13}{20}\]
\[\frac{3}{8} + \frac{1}{6} = \frac{9}{24} + \frac{4}{24} = \frac{13}{24}\]
\[\frac{5}{12} + \frac{2}{9} = \frac{15}{36} + \frac{8}{36} = \frac{23}{36}\]
\[\frac{1}{7} + \frac{3}{14} = \frac{2}{14} + \frac{3}{14} = \frac{5}{14}\]
\[\frac{3}{4} - \frac{1}{6} = \frac{9}{12} - \frac{2}{12} = \frac{7}{12}\]
\[\frac{7}{8} - \frac{2}{5} = \frac{35}{40} - \frac{16}{40} = \frac{19}{40}\]
\[\frac{5}{9} - \frac{1}{3} = \frac{5}{9} - \frac{3}{9} = \frac{2}{9}\]
\[\frac{4}{5} - \frac{3}{10} = \frac{8}{10} - \frac{3}{10} = \frac{5}{10} = \frac{1}{2}\]
\[\frac{11}{12} - \frac{2}{3} = \frac{11}{12} - \frac{8}{12} = \frac{3}{12} = \frac{1}{4}\]
\[\frac{2}{3} \times \frac{5}{7} = \frac{10}{21}\]
\[3 \times \frac{4}{9} = \frac{3}{1} \times \frac{4}{9} = \frac{12}{9} = \frac{4}{3} = 1\frac{1}{3}\]
\[\frac{5}{6} \times \frac{3}{10} = \frac{15}{60} = \frac{1}{4}\]
\[5 \times \frac{2}{15} = \frac{5}{1} \times \frac{2}{15} = \frac{10}{15} = \frac{2}{3}\]
\[\frac{7}{8} \times \frac{4}{21} = \frac{28}{168} = \frac{1}{6}\]
\[\frac{3}{5} \div \frac{2}{7} = \frac{3}{5} \times \frac{7}{2} = \frac{21}{10} = 2\frac{1}{10}\]
\[4 \div \frac{2}{3} = \frac{4}{1} \div \frac{2}{3} = \frac{4}{1} \times \frac{3}{2} = \frac{12}{2} = 6\]
\[\frac{8}{9} \div \frac{4}{3} = \frac{8}{9} \times \frac{3}{4} = \frac{24}{36} = \frac{2}{3}\]
\[6 \div \frac{3}{5} = \frac{6}{1} \div \frac{3}{5} = \frac{6}{1} \times \frac{5}{3} = \frac{30}{3} = 10\]
\[\frac{5}{12} \div \frac{10}{3} = \frac{5}{12} \times \frac{3}{10} = \frac{15}{120} = \frac{1}{8}\]
Ответ: Выполнено сложение, вычитание, умножение и деление обыкновенных дробей и дробей на целые числа.