Ответ:
- \(\frac{5}{6}+\frac{1}{4}=\frac{10}{12}+\frac{3}{12}=\frac{13}{12}=1\frac{1}{12}\).
- \(\frac{11}{12}−\frac{5}{8}=\frac{22}{24}−\frac{15}{24}=\frac{7}{24}\).
- \(2\frac{1}{6}−1\frac{3}{4}=\frac{13}{6}−\frac{7}{4}=\frac{26}{12}−\frac{21}{12}=\frac{5}{12}\).
- \(\frac{3}{7}\cdot\frac{14}{9}=\frac{42}{63}=\frac{2}{3}\).
Ответ: а) \(1\frac{1}{12}\); б) \(\frac{7}{24}\); в) \(\frac{5}{12}\); г) \(\frac{2}{3}\).
