1. Выполните деление: 1) 1:$$\frac{1}{9}$$; 2) 1: 0,7; 3) $$\frac{5}{6}: \frac{6}{7}$$; 4) $$\frac{8}{27}: \frac{32}{45}$$; 5) 4:$$\frac{3}{13}$$; 6) $$\frac{9}{28}: 18$$.

1) $$1:\frac{1}{9} = 1 \cdot \frac{9}{1} = 9$$

2) $$1:0,7 = 1: \frac{7}{10} = 1 \cdot \frac{10}{7} = \frac{10}{7} = 1\frac{3}{7}$$

3) $$\frac{5}{6}:\frac{6}{7} = \frac{5}{6} \cdot \frac{7}{6} = \frac{35}{36}$$

4) $$\frac{8}{27}:\frac{32}{45} = \frac{8}{27} \cdot \frac{45}{32} = \frac{1}{3} \cdot \frac{5}{4} = \frac{5}{12}$$

5) $$4:\frac{3}{13} = 4 \cdot \frac{13}{3} = \frac{52}{3} = 17\frac{1}{3}$$

6) $$\frac{9}{28}:18 = \frac{9}{28} \cdot \frac{1}{18} = \frac{1}{28} \cdot \frac{1}{2} = \frac{1}{56}$$

Ответ: 1) 9; 2) $$1\frac{3}{7}$$; 3) $$\frac{35}{36}$$; 4) $$\frac{5}{12}$$; 5) $$17\frac{1}{3}$$; 6) $$\frac{1}{56}$$