15. Выполните сложение и вычитание дробей

Давай решим эти примеры по порядку: 1) $\frac{7}{48} + \frac{11}{36} = \frac{21}{144} + \frac{44}{144} = \frac{65}{144}$ 2) $\frac{26}{45} - \frac{16}{30} = \frac{26}{45} - \frac{8}{15} = \frac{26}{45} - \frac{24}{45} = \frac{2}{45}$ 3) $\frac{13}{18} - \frac{5}{24} = \frac{52}{72} - \frac{15}{72} = \frac{37}{72}$ 4) $1 + \frac{3}{8} = 1\frac{3}{8}$ 5) $2 - \frac{5}{6} = 1\frac{6}{6} - \frac{5}{6} = 1\frac{1}{6}$ 6) $2 + \frac{3}{5} = 2\frac{3}{5}$ 7) $3 - \frac{10}{17} = 2\frac{17}{17} - \frac{10}{17} = 2\frac{7}{17}$ 8) $22\frac{11}{15} - 22 = \frac{11}{15}$ 9) $12\frac{9}{25} + 7\frac{32}{50} = 12\frac{9}{25} + 7\frac{16}{25} = 19\frac{25}{25} = 20$ 10) $5\frac{3}{20} - 4\frac{7}{10} = 5\frac{3}{20} - 4\frac{14}{20} = 4\frac{23}{20} - 4\frac{14}{20} = \frac{9}{20}$ 11) $11\frac{1}{4} + 3\frac{7}{10} = 11\frac{5}{20} + 3\frac{14}{20} = 14\frac{19}{20}$ 12) $40\frac{3}{16} - 21\frac{5}{8} = 40\frac{3}{16} - 21\frac{10}{16} = 39\frac{19}{16} - 21\frac{10}{16} = 18\frac{9}{16}$ 13) $5\frac{3}{14} - 4\frac{5}{7} = 5\frac{3}{14} - 4\frac{10}{14} = 4\frac{17}{14} - 4\frac{10}{14} = \frac{7}{14} = \frac{1}{2}$