1. Выполните действия: a) \(\frac{5}{9} + \frac{2}{3}\) b) \(1 \frac{1}{3} : \frac{4}{5}\) v) \(3 - 2 \frac{5}{7}\) g) \(30 \cdot \frac{5}{6}\)

a) \(\frac{5}{9} + \frac{2}{3} = \frac{5}{9} + \frac{6}{9} = \frac{11}{9} = 1 \frac{2}{9}\) b) \(1 \frac{1}{3} : \frac{4}{5} = \frac{4}{3} : \frac{4}{5} = \frac{4}{3} \cdot \frac{5}{4} = \frac{20}{12} = \frac{5}{3} = 1 \frac{2}{3}\) v) \(3 - 2 \frac{5}{7} = 3 - \frac{19}{7} = \frac{21}{7} - \frac{19}{7} = \frac{2}{7}\) g) \(30 \cdot \frac{5}{6} = \frac{30 \cdot 5}{6} = \frac{150}{6} = 25\)