[tex]a)\\\\1\frac{1}{2}:\frac{3}{8}:\frac{5}{24}= \frac{\not{3}^1}{\not{2}^1}*\frac{\not{8}^4}{\not{3}^1}*\frac{24}{5}= \frac{96}{5}=19\frac{1}{5}\\\\b)\\\\2\frac{2}{3}:1\frac{1}{2}:\frac{1}{3}=\frac{8}{3}: \frac{3}{2}*\frac{3}{1}=\frac{8}{3}*\frac{2}{\not{3}^1}*\frac{\not{3}^1}{1}=\frac{16}{3}=5\frac{1}{3} \\\\c)\\\\1\frac{1}{2}:\frac{2}{3} *3\frac{2}{3}=\frac{3}{2}*\frac{\not{3}^1}{2} * \frac{11}{\not{3}^1}=\frac{33}{4}=8\frac{1}{4}\\\\d)\\\\4\frac{3}{9}-2\frac{1}{5}:1\frac{9}{10}=4\frac{3}{9}- \frac{11}{5}: \frac{19}{10}=4\frac{3}{9}- \frac{11}{\not{5}^1}*\frac{\not{10}^2}{ 9}=4\frac{3}{9}-\frac{22}{9}=4\frac{3}{9}-2\frac{4}{9}=\\\\=3\frac{12}{9}-2\frac{4}{9}=\frac{8}{9}[/tex]
