Выполни действия с дробями в столбиках А, Б и В

Привет! Давай выполним действия с дробями. **Столбец А** а) $\frac{3}{4} - \frac{2}{5} = \frac{15}{20} - \frac{8}{20} = \frac{7}{20}$ б) $\frac{1}{3} + \frac{5}{12} = \frac{4}{12} + \frac{5}{12} = \frac{9}{12} = \frac{3}{4}$ в) $\frac{5}{8} - \frac{3}{16} = \frac{10}{16} - \frac{3}{16} = \frac{7}{16}$ г) $\frac{1}{10} + \frac{7}{10} = \frac{8}{10} = \frac{4}{5}$ д) $\frac{9}{17} + \frac{8}{17} = \frac{17}{17} = 1$ **Столбец Б** а) $\frac{2}{7} + \frac{1}{6} = \frac{12}{42} + \frac{7}{42} = \frac{19}{42}$ б) $\frac{7}{15} - \frac{1}{15} = \frac{6}{15} = \frac{2}{5}$ в) $\frac{2}{9} + \frac{7}{18} = \frac{4}{18} + \frac{7}{18} = \frac{11}{18}$ г) $\frac{14}{21} - \frac{4}{7} = \frac{2}{3} - \frac{4}{7} = \frac{14}{21} - \frac{12}{21} = \frac{2}{21}$ д) $\frac{4}{15} + \frac{1}{3} = \frac{4}{15} + \frac{5}{15} = \frac{9}{15} = \frac{3}{5}$ **Столбец В** а) $\frac{5}{8} + \frac{5}{6} = \frac{15}{24} + \frac{20}{24} = \frac{35}{24} = 1 \frac{11}{24}$ б) $\frac{3}{20} - \frac{1}{50} = \frac{15}{100} - \frac{2}{100} = \frac{13}{100}$ в) $\frac{8}{51} + \frac{3}{17} = \frac{8}{51} + \frac{9}{51} = \frac{17}{51} = \frac{1}{3}$ г) $\frac{1}{3} - \frac{1}{6} = \frac{2}{6} - \frac{1}{6} = \frac{1}{6}$ д) $0.35 + \frac{1}{20} = \frac{35}{100} + \frac{5}{100} = \frac{40}{100} = \frac{2}{5} = 0.4$