2. Выполнить деление: 72 6 12 3 1 35 a):--:--;6)-:--;в)3:2--;2)--:7. 93 7 35 5 10 38

а)

\[\frac{7}{9} : \frac{2}{3} = \frac{7}{9} \cdot \frac{3}{2} = \frac{7 \cdot 3}{9 \cdot 2} = \frac{7 \cdot 1}{3 \cdot 2} = \frac{7}{6}\]

б)

\[\frac{6}{7} : \frac{12}{35} = \frac{6}{7} \cdot \frac{35}{12} = \frac{6 \cdot 35}{7 \cdot 12} = \frac{1 \cdot 5}{1 \cdot 2} = \frac{5}{2}\]

в)

\[3\frac{3}{5} : 2\frac{1}{10} = \frac{3 \cdot 5 + 3}{5} : \frac{2 \cdot 10 + 1}{10} = \frac{18}{5} : \frac{21}{10} = \frac{18}{5} \cdot \frac{10}{21} = \frac{18 \cdot 10}{5 \cdot 21} = \frac{6 \cdot 2}{1 \cdot 7} = \frac{12}{7}\]

г)

\[\frac{35}{38} : 7 = \frac{35}{38} \cdot \frac{1}{7} = \frac{35 \cdot 1}{38 \cdot 7} = \frac{5 \cdot 1}{38 \cdot 1} = \frac{5}{38}\]