1. Вычислите: 1) $$rac{18}{25} : \frac{3}{5}$$ 2) $$2\frac{5}{8} : 2\frac{1}{4}$$ 3) $$7 : \frac{14}{15}$$ 4) $$rac{16}{17} : 8$$

1) $$rac{18}{25} : \frac{3}{5} = \frac{18}{25} \cdot \frac{5}{3} = \frac{18 \cdot 5}{25 \cdot 3} = \frac{6 \cdot 1}{5 \cdot 1} = \frac{6}{5} = 1\frac{1}{5} = 1,2$$ <br> 2) $$2\frac{5}{8} : 2\frac{1}{4} = \frac{21}{8} : \frac{9}{4} = \frac{21}{8} \cdot \frac{4}{9} = \frac{21 \cdot 4}{8 \cdot 9} = \frac{7 \cdot 1}{2 \cdot 3} = \frac{7}{6} = 1\frac{1}{6}$$ <br> 3) $$7 : \frac{14}{15} = 7 \cdot \frac{15}{14} = \frac{7 \cdot 15}{14} = \frac{1 \cdot 15}{2} = \frac{15}{2} = 7\frac{1}{2} = 7,5$$ <br> 4) $$\frac{16}{17} : 8 = \frac{16}{17} \cdot \frac{1}{8} = \frac{16 \cdot 1}{17 \cdot 8} = \frac{2 \cdot 1}{17 \cdot 1} = \frac{2}{17}$$