Вариант 4. Выполните вычитание: a) 1-\(\frac{5}{6}\) б) 5-2\(\frac{5}{9}\) в) 8\(\frac{3}{4}\)-7\(\frac{5}{6}\) г) 2\(\frac{5}{8}\)-1\(\frac{3}{10}\) д) 8\(\frac{19}{20}\)-3\(\frac{7}{30}\)

Решение:

Вариант 4.

1. \(1 - \frac{5}{6} = \frac{6}{6} - \frac{5}{6} = \frac{1}{6}\)
2. \(5 - 2\frac{5}{9} = 4\frac{9}{9} - 2\frac{5}{9} = 2\frac{4}{9}\)
3. \(8\frac{3}{4} - 7\frac{5}{6} = 8\frac{9}{12} - 7\frac{10}{12} = 7\frac{21}{12} - 7\frac{10}{12} = \frac{11}{12}\)
4. \(2\frac{5}{8} - 1\frac{3}{10} = 2\frac{25}{40} - 1\frac{12}{40} = 1\frac{13}{40}\)
5. \(8\frac{19}{20} - 3\frac{7}{30} = 8\frac{57}{60} - 3\frac{14}{60} = 5\frac{43}{60}\)

Ответ: а) \(\frac{1}{6}\); б) \(2\frac{4}{9}\); в) \(\frac{11}{12}\); г) \(1\frac{13}{40}\); д) \(5\frac{43}{60}\).