Вычисли значение выражения 4 4/9 + 5/8 - 3 5/9 наиболее удобным способом

Давай решим примеры из твоего учебника! 1) $4\frac{4}{9} + \frac{5}{8} - 3\frac{5}{9} = (4\frac{4}{9} - 3\frac{5}{9}) + \frac{5}{8} = (4 - 3 + \frac{4}{9} - \frac{5}{9}) + \frac{5}{8} = 1 - \frac{1}{9} + \frac{5}{8} = \frac{8}{8} - \frac{1}{9} + \frac{5}{8} = \frac{7}{8} + \frac{5}{8} = \frac{12}{8} = \frac{3}{2} = 1\frac{1}{2}$ 2) $3\frac{7}{8} + 4\frac{4}{5} - 1\frac{5}{8} = (3\frac{7}{8} - 1\frac{5}{8}) + 4\frac{4}{5} = (3 - 1 + \frac{7}{8} - \frac{5}{8}) + 4\frac{4}{5} = 2 + \frac{2}{8} + 4\frac{4}{5} = 2 + \frac{1}{4} + 4\frac{4}{5} = 6 + \frac{1}{4} + \frac{4}{5} = 6 + \frac{5}{20} + \frac{16}{20} = 6 + \frac{21}{20} = 6 + 1\frac{1}{20} = 7\frac{1}{20}$ 3) $2\frac{11}{15} \cdot 1\frac{1}{19} - 1\frac{1}{19} \cdot 1\frac{3}{10} - \frac{1}{6} \cdot 1\frac{1}{19} = 1\frac{1}{19} \cdot (2\frac{11}{15} - 1\frac{3}{10} - \frac{1}{6}) = 1\frac{1}{19} \cdot (2\frac{22}{30} - 1\frac{9}{30} - \frac{5}{30}) = 1\frac{1}{19} \cdot (1 + \frac{22}{30} - \frac{9}{30} - \frac{5}{30}) = 1\frac{1}{19} \cdot (1 + \frac{8}{30}) = 1\frac{1}{19} \cdot 1\frac{4}{15} = \frac{20}{19} \cdot \frac{19}{15} = \frac{20}{15} = \frac{4}{3} = 1\frac{1}{3}$ 4) $4\frac{7}{9} \cdot 1\frac{13}{14} - 3\frac{7}{12} \cdot 1\frac{13}{14} + 1\frac{1}{14} \cdot 1\frac{13}{14} = 1\frac{13}{14} \cdot (4\frac{7}{9} - 3\frac{7}{12} + 1\frac{1}{14}) = \frac{27}{14} \cdot (4\frac{28}{36} - 3\frac{21}{36} + 1\frac{1}{14}) = \frac{27}{14} \cdot (1\frac{7}{36} + 1\frac{1}{14}) = \frac{27}{14} \cdot (1\frac{49}{252} + 1\frac{18}{252}) = \frac{27}{14} \cdot (2\frac{67}{252}) = \frac{27}{14} \cdot \frac{571}{252} = \frac{1}{14} \cdot \frac{571}{28} = \frac{571}{392} = 1\frac{179}{392}$