Вопрос:

1. Выполните действия: a) 1\(\frac{2}{3}\) + 3\(\frac{1}{3}\) - 2\(\frac{1}{3}\); б) 2\(\frac{1}{6}\) + 3\(\frac{2}{3}\) + 4\(\frac{5}{6}\); в) 7\(\frac{5}{12}\) - 1\(\frac{5}{6}\) + 3\(\frac{1}{24}\); г) 9\(\frac{7}{18}\) - 6\(\frac{2}{36}\) + 11\(\frac{2}{9}\).

Ответ:

1. Выполнение действий:

  1. а) \(1\frac{2}{3} + 3\frac{1}{3} - 2\frac{1}{3} = \frac{5}{3} + \frac{10}{3} - \frac{7}{3} = \frac{5+10-7}{3} = \frac{8}{3} = 2\frac{2}{3}\)
  2. б) \(2\frac{1}{6} + 3\frac{2}{3} + 4\frac{5}{6} = 2\frac{1}{6} + 3\frac{4}{6} + 4\frac{5}{6} = \frac{13}{6} + \frac{22}{6} + \frac{29}{6} = \frac{13+22+29}{6} = \frac{64}{6} = \frac{32}{3} = 10\frac{2}{3}\)
  3. в) \(7\frac{5}{12} - 1\frac{5}{6} + 3\frac{1}{24} = 7\frac{10}{24} - 1\frac{20}{24} + 3\frac{1}{24} = \frac{178}{24} - \frac{44}{24} + \frac{73}{24} = \frac{178 - 44 + 73}{24} = \frac{207}{24} = \frac{69}{8} = 8\frac{5}{8}\)
  4. г) \(9\frac{7}{18} - 6\frac{2}{36} + 11\frac{2}{9} = 9\frac{14}{36} - 6\frac{2}{36} + 11\frac{8}{36} = \frac{338}{36} - \frac{218}{36} + \frac{404}{36} = \frac{338 - 218 + 404}{36} = \frac{524}{36} = \frac{131}{9} = 14\frac{5}{9}\)

Ответ: а) \(2\frac{2}{3}\); б) \(10\frac{2}{3}\); в) \(8\frac{5}{8}\); г) \(14\frac{5}{9}\).