Ответ:
- \(3\frac{2}{7}\cdot3\frac{1}{2}=\frac{23}{7}\cdot\frac{7}{2}=\frac{23}{2}=11\frac{1}{2}\).
- \(5\frac{7}{9}\cdot4\frac{4}{7}=\frac{52}{9}\cdot\frac{32}{7}=\frac{1664}{63}=26\frac{26}{63}\).
- \(2:\frac{3}{4}=2\cdot\frac{4}{3}=\frac{8}{3}=2\frac{2}{3}\).
- \(3:\frac{7}{9}=3\cdot\frac{9}{7}=\frac{27}{7}=3\frac{6}{7}\).
- \(-\frac{7}{8}:\frac{2}{5}=-\frac{7}{8}\cdot\frac{5}{2}=-\frac{35}{16}=-2\frac{3}{16}\).
- \(\frac{3}{7}:\left(-\frac{5}{6}\right)=\frac{3}{7}\cdot\left(-\frac{6}{5}\right)=-\frac{18}{35}\).
- \(\left(-3\frac{1}{2}\right):\left(-3\frac{2}{7}\right)=\left(-\frac{7}{2}\right):\left(-\frac{23}{7}\right)=\frac{49}{46}=1\frac{3}{46}\).
- \(\left(-4\frac{4}{7}\right):\left(-6\frac{7}{8}\right)=\left(-\frac{32}{7}\right):\left(-\frac{55}{8}\right)=\frac{256}{385}\).
Ответ: 7) \(11\frac{1}{2}\); 8) \(26\frac{26}{63}\); 9) \(\frac{8}{3}\); 10) \(\frac{27}{7}\); 11) \(-\frac{35}{16}\); 12) \(-\frac{18}{35}\); 13) \(\frac{49}{46}\); 14) \(\frac{256}{385}\).
