Вариант 5 1 (0,5:1,25+1$$\frac{2}{5}$$:1$$\frac{4}{7}$$):3$$\frac{3}{11}$$:$$\frac{2}{11}$$

Выполним действия по шагам: 1) $$0,5 : 1,25 = \frac{0,5}{1,25} = \frac{50}{125} = \frac{2}{5} = 0,4$$ 2) $$1\frac{2}{5} : 1\frac{4}{7} = \frac{7}{5} : \frac{11}{7} = \frac{7}{5} \cdot \frac{7}{11} = \frac{49}{55}$$ 3) $$0,4 + \frac{49}{55} = \frac{2}{5} + \frac{49}{55} = \frac{2 \cdot 11}{5 \cdot 11} + \frac{49}{55} = \frac{22}{55} + \frac{49}{55} = \frac{71}{55}$$ 4) $$\frac{71}{55} : 3\frac{3}{11} = \frac{71}{55} : \frac{36}{11} = \frac{71}{55} \cdot \frac{11}{36} = \frac{71}{5 \cdot 36} = \frac{71}{180}$$ 5) $$\frac{71}{180} : \frac{2}{11} = \frac{71}{180} \cdot \frac{11}{2} = \frac{781}{360} = 2\frac{61}{360}$$ Ответ: $$2\frac{61}{360}$$