3 (3$$\frac{4}{27}$$-0,7$$\cdot$$1$$\frac{2}{3}$$+$$\frac{7}{18}$$):$$\frac{4}{27}$$-8,3

Выполним действия по шагам: 1) 3$$\frac{4}{27}$$ = $$\frac{85}{27}$$ 2) 0,7 = $$\frac{7}{10}$$ 3) 1$$\frac{2}{3}$$ = $$\frac{5}{3}$$ 4) $$\frac{7}{10} \cdot \frac{5}{3}$$ = $$\frac{7}{2 \cdot 3}$$ = $$\frac{7}{6}$$ 5) $$\frac{85}{27} - \frac{7}{6} + \frac{7}{18}$$ = $$\frac{85 \cdot 2}{27 \cdot 2} - \frac{7 \cdot 9}{6 \cdot 9} + \frac{7 \cdot 3}{18 \cdot 3}$$ = $$\frac{170}{54} - \frac{63}{54} + \frac{21}{54}$$ = $$\frac{170 - 63 + 21}{54}$$ = $$\frac{128}{54}$$ = $$\frac{64}{27}$$ 6) $$\frac{64}{27} : \frac{4}{27}$$ = $$\frac{64}{27} \cdot \frac{27}{4}$$ = 16 7) 16 - 8,3 = 7,7 Ответ: 7,7