Вариант 2. Выполните вычитание: a) 1-\(\frac{4}{9}\) б) 4-3\(\frac{3}{4}\) в) 7\(\frac{1}{10}\)-3\(\frac{1}{6}\) г) 9\(\frac{4}{21}\)-4\(\frac{11}{14}\) д) 8\(\frac{8}{15}\)-4\(\frac{9}{20}\) е) 5\(\frac{5}{33}\)-4\(\frac{7}{22}\)

Решение:

Вариант 2.

1. \(1 - \frac{4}{9} = \frac{9}{9} - \frac{4}{9} = \frac{5}{9}\)
2. \(4 - 3\frac{3}{4} = 3\frac{4}{4} - 3\frac{3}{4} = \frac{1}{4}\)
3. \(7\frac{1}{10} - 3\frac{1}{6} = 7\frac{3}{30} - 3\frac{5}{30} = 6\frac{33}{30} - 3\frac{5}{30} = 3\frac{28}{30} = 3\frac{14}{15}\)
4. \(9\frac{4}{21} - 4\frac{11}{14} = 9\frac{8}{42} - 4\frac{33}{42} = 8\frac{50}{42} - 4\frac{33}{42} = 4\frac{17}{42}\)
5. \(8\frac{8}{15} - 4\frac{9}{20} = 8\frac{32}{60} - 4\frac{27}{60} = 4\frac{5}{60} = 4\frac{1}{12}\)
6. \(5\frac{5}{33} - 4\frac{7}{22} = 5\frac{10}{66} - 4\frac{21}{66} = 4\frac{76}{66} - 4\frac{21}{66} = 4\frac{55}{66} = 4\frac{5}{6}\)

Ответ: а) \(\frac{5}{9}\); б) \(\frac{1}{4}\); в) \(3\frac{14}{15}\); г) \(4\frac{17}{42}\); д) \(4\frac{1}{12}\); е) \(4\frac{5}{6}\).