Ответ:
а) \(1-\frac{4}{9}=\frac{9}{9}-\frac{4}{9}=\frac{5}{9}\).
б) \(4-3\frac{3}{4}=1-\frac{3}{4}=\frac{1}{4}\).
в) \(7\frac{1}{10}-3\frac{1}{6}=4+\frac{3}{30}-\frac{5}{30}=3\frac{28}{30}=3\frac{14}{15}\).
г) \(8\frac{8}{15}-4\frac{9}{20}=4+\frac{32}{60}-\frac{27}{60}=4\frac{5}{60}=4\frac{1}{12}\).
д) \(9\frac{4}{21}-4\frac{11}{14}=5+\frac{8}{42}-\frac{33}{42}=4\frac{17}{42}\).
е) \(5\frac{5}{33}-4\frac{7}{22}=1+\frac{10}{66}-\frac{21}{66}=\frac{55}{66}=\frac{5}{6}\).
Ответ: а) 5/9; б) 1/4; в) 3 14/15; г) 4 1/12; д) 4 17/42; е) 5/6.
