Ответ:

  1. а) \(1\frac{1}{2}+\frac{3}{4}=\frac{3}{2}+\frac{3}{4}=\frac{9}{4}\). Кейин \(\frac{9}{4}:\frac{9}{10}=\frac{5}{2}\), шунинг учун \(\frac{5}{2}-\frac{5}{6}=\frac{15}{6}-\frac{5}{6}=\frac{5}{3}=1\frac{2}{3}\).
  2. б) \(2-\frac{3}{5}=\frac{7}{5}\), \(\frac{5}{7}+\frac{2}{3}=\frac{15}{21}+\frac{14}{21}=\frac{29}{21}\). Кўпайтириш: \(\frac{7}{5}\cdot\frac{29}{21}=\frac{29}{15}=1\frac{14}{15}\).
  3. в) \(1\frac{1}{2}+2\frac{5}{6}=\frac{3}{2}+\frac{17}{6}=\frac{13}{3}\). Кейин \(3\frac{1}{3}:\frac{13}{3}\cdot13=\frac{10}{3}:\frac{13}{3}\cdot13=\frac{10}{13}\cdot13=10\).
  4. г) \(\frac{7}{8}-\frac{5}{12}=\frac{21}{24}-\frac{10}{24}=\frac{11}{24}\). Кейин \(\frac{11}{24}:\frac{11}{24}+1\frac{1}{2}=1+\frac{3}{2}=2\frac{1}{2}\).

Ответ: а) \(1\frac{2}{3}\); б) \(1\frac{14}{15}\); в) 10; г) \(2\frac{1}{2}\).