Вычислите значения выражений в столбце В.

Решения для столбца В: 1. $$\frac{11}{20} - \frac{5}{12} = \frac{33}{60} - \frac{25}{60} = \frac{8}{60} = \frac{2}{15}$$ 2. $$\frac{8}{9} + \frac{7}{54} = \frac{48}{54} + \frac{7}{54} = \frac{55}{54} = 1\frac{1}{54}$$ 3. $$\frac{5}{6} - \frac{17}{21} = \frac{35}{42} - \frac{34}{42} = \frac{1}{42}$$ 4. $$\frac{3}{16} + \frac{1}{24} = \frac{9}{48} + \frac{2}{48} = \frac{11}{48}$$ 5. $$\frac{5}{6} - \frac{22}{27} = \frac{45}{54} - \frac{44}{54} = \frac{1}{54}$$ 6. $$\frac{7}{25} - \frac{4}{15} = \frac{21}{75} - \frac{20}{75} = \frac{1}{75}$$ 7. $$\frac{3}{10} + \frac{1}{6} = \frac{9}{30} + \frac{5}{30} = \frac{14}{30} = \frac{7}{15}$$ 8. $$\frac{2}{5} - \frac{11}{30} = \frac{12}{30} - \frac{11}{30} = \frac{1}{30}$$ 9. $$\frac{3}{8} + \frac{7}{20} = \frac{15}{40} + \frac{14}{40} = \frac{29}{40}$$ 10. $$\frac{1}{6} - \frac{1}{7} = \frac{7}{42} - \frac{6}{42} = \frac{1}{42}$$ 11. $$\frac{5}{9} + \frac{7}{15} = \frac{25}{45} + \frac{21}{45} = \frac{46}{45} = 1\frac{1}{45}$$ 12. $$\frac{3}{8} + \frac{19}{56} = \frac{21}{56} + \frac{19}{56} = \frac{40}{56} = \frac{5}{7}$$ 13. $$\frac{19}{45} - \frac{7}{18} = \frac{38}{90} - \frac{35}{90} = \frac{3}{90} = \frac{1}{30}$$ 14. $$\frac{1}{4} - \frac{1}{8} = \frac{2}{8} - \frac{1}{8} = \frac{1}{8}$$ 15. $$\frac{11}{14} + \frac{8}{21} = \frac{33}{42} + \frac{16}{42} = \frac{49}{42} = \frac{7}{6} = 1\frac{1}{6}$$