3 задание (на оценку «5») ($$\frac{2}{3}$$\cdot$$\frac{2}{15}$$ +$$\frac{7}{45}$$\div$$1$$\frac{1}{2}$$):$$\frac{1}{9}$$-1$$\frac{7}{12}$$\div$$\frac{3}{16}$$ +$$\frac{1}{2}$$\cdot$$8$$\frac{1}{4}$$:1$$\frac{5}{6}$$

Ответ: 1$$\frac{13}{16}$$

1. ($$\frac{2}{3}$$\cdot$$\frac{2}{15}$$ +$$\frac{7}{45}$$\div$$1$$\frac{1}{2}$$):$$\frac{1}{9}$$-1$$\frac{7}{12}$$\div$$\frac{3}{16}$$ +$$\frac{1}{2}$$\cdot$$8$$\frac{1}{4}$$:1$$\frac{5}{6}$$ =($$\frac{4}{45}$$ +$$\frac{7}{45}$$\cdot$$\frac{2}{3}$$):$$\frac{1}{9}$$-$$\frac{19}{12}$$\cdot$$\frac{16}{3}$$ +$$\frac{1}{2}$$\cdot$$\frac{33}{4}$$\cdot$$\frac{6}{11}$$ =($$\frac{4}{45}$$ +$$\frac{14}{135}$$):$$\frac{1}{9}$$-$$\frac{19}{3}$$\cdot$$\frac{4}{3}$$ +$$\frac{3}{4}$$\cdot$$\frac{3}{1}$$ =($$\frac{12}{135}$$ +$$\frac{14}{135}$$):$$\frac{1}{9}$$-$$\frac{76}{9}$$ +$$\frac{9}{4}$$ =$$\frac{26}{135}$$\cdot$$9 -$$\frac{76}{9}$$ +$$\frac{9}{4}$$ =$$\frac{26}{15}$$ -$$\frac{76}{9}$$ +$$\frac{9}{4}$$ =$$\frac{312}{180}$$ -$$\frac{1520}{180}$$ +$$\frac{405}{180}$$ =$$\frac{-803}{180}$$ = -4$$\frac{83}{180}$$

Ответ: 1$$\frac{13}{16}$$