355. Выполните действия: a) 11륵 +4윽-6;; б) 261-130+500 B) 44+80- 7. ;; e) 8-4-20

355. Выполните действия:

1. а) \( 11\frac{2}{7} + 4\frac{3}{7} - 6\frac{4}{7} = (11 + 4 - 6) + (\frac{2}{7} + \frac{3}{7} - \frac{4}{7}) = 9 + \frac{1}{7} = 9\frac{1}{7} \)
2. б) \( 26\frac{7}{19} - 13\frac{4}{19} + 5\frac{2}{19} = (26 - 13 + 5) + (\frac{7}{19} - \frac{4}{19} + \frac{2}{19}) = 18 + \frac{5}{19} = 18\frac{5}{19} \)
3. в) \( 4\frac{2}{9} + 8\frac{5}{9} - \frac{7}{9} = (4 + 8) + (\frac{2}{9} + \frac{5}{9} - \frac{7}{9}) = 12 + 0 = 12 \)
4. г) \( 5\frac{7}{10} + 3\frac{9}{10} + 1\frac{3}{10} = (5 + 3 + 1) + (\frac{7}{10} + \frac{9}{10} + \frac{3}{10}) = 9 + \frac{19}{10} = 9 + 1\frac{9}{10} = 10\frac{9}{10} \)
5. д) \( 3\frac{17}{100} - 2\frac{13}{100} - 1 = (3 - 2 - 1) + (\frac{17}{100} - \frac{13}{100}) = 0 + \frac{4}{100} = \frac{4}{100} = 0,04 \)
6. е) \( 8 - 4\frac{31}{100} - 2\frac{57}{100} = (8 - 4 - 2) + ( -\frac{31}{100} - \frac{57}{100}) = 2 - \frac{88}{100} = 2 - \frac{88}{100} = 1\frac{100}{100} + \frac{100}{100} - \frac{88}{100} = 1\frac{12}{100} = 1\frac{3}{25} \)

Ответ: a) \(9\frac{1}{7}\); б) \(18\frac{5}{19}\); в) 12; г) \(10\frac{9}{10}\); д) 0,04; е) \(1\frac{3}{25}\)