Ответ:
1. Выполнение действий:
- а) \(1\frac{2}{3} + 3\frac{1}{3} - 2\frac{1}{3} = \frac{5}{3} + \frac{10}{3} - \frac{7}{3} = \frac{5+10-7}{3} = \frac{8}{3} = 2\frac{2}{3}\)
- б) \(2\frac{1}{6} + 3\frac{2}{3} + 4\frac{5}{6} = 2\frac{1}{6} + 3\frac{4}{6} + 4\frac{5}{6} = \frac{13}{6} + \frac{22}{6} + \frac{29}{6} = \frac{13+22+29}{6} = \frac{64}{6} = \frac{32}{3} = 10\frac{2}{3}\)
- в) \(7\frac{5}{12} - 1\frac{5}{6} + 3\frac{1}{24} = 7\frac{10}{24} - 1\frac{20}{24} + 3\frac{1}{24} = \frac{178}{24} - \frac{44}{24} + \frac{73}{24} = \frac{178 - 44 + 73}{24} = \frac{207}{24} = \frac{69}{8} = 8\frac{5}{8}\)
- 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) \(14\frac{5}{9}\).
