Реши примеры на сложение, вычитание, умножение и деление дробей: 1/3 + 1/2

1) $\frac{1}{3} + \frac{1}{2} = \frac{2}{6} + \frac{3}{6} = \frac{5}{6}$ 2) $\frac{2}{5} + \frac{3}{10} = \frac{4}{10} + \frac{3}{10} = \frac{7}{10}$ 3) $\frac{7}{8} - \frac{3}{16} = \frac{14}{16} - \frac{3}{16} = \frac{11}{16}$ 4) $\frac{11}{12} - \frac{3}{4} = \frac{11}{12} - \frac{9}{12} = \frac{2}{12} = \frac{1}{6}$ 5) $\frac{4}{15} + \frac{3}{12} = \frac{16}{60} + \frac{15}{60} = \frac{31}{60}$ 6) $\frac{18}{28} : \frac{6}{4} = \frac{18}{28} \cdot \frac{4}{6} = \frac{3}{7} \cdot \frac{1}{1} = \frac{3}{7}$ 7) $\frac{42}{5} \cdot \frac{55}{7} = \frac{6}{1} \cdot \frac{11}{1} = 66$ 8) $\frac{7}{12} \cdot \frac{3}{12} = \frac{7}{4} \cdot \frac{1}{12} = \frac{7}{48}$ 9) $\frac{14}{55} : \frac{7}{22} = \frac{14}{55} \cdot \frac{22}{7} = \frac{2}{5} \cdot \frac{2}{1} = \frac{4}{5}$ 10) $\frac{9}{8} \cdot \frac{5}{8} \cdot \frac{3}{10} = \frac{9}{8} \cdot \frac{1}{8} \cdot \frac{3}{2} = \frac{27}{128}$