2.309 Найдите значение выражения: a) (1$$\frac{1}{2}$$)$$^3$$ - 2$$\frac{2}{3}$$\cdot$$1$$\frac{1}{4}$$; б) (3,5 - 2,9)$$\cdot$$(4$$\frac{1}{22}$$ - 3$$\frac{7}{33}$$); в) (5$$\frac{3}{14}$$)

a) (1$$\frac{1}{2}$$)$$^3$$ - 2$$\frac{2}{3}$$\cdot$$1$$\frac{1}{4}$$ = ($$\frac{3}{2}$$)$$^3$$ - $$\frac{8}{3}$$\cdot$$\frac{5}{4}$$ = $$\frac{27}{8}$$ - $$\frac{40}{12}$$ = $$\frac{27}{8}$$ - $$\frac{10}{3}$$ = $$\frac{81-80}{24}$$ = $$\frac{1}{24}$$ б) (3,5 - 2,9)$$\cdot$$(4$$\frac{1}{22}$$ - 3$$\frac{7}{33}$$) = 0,6$$\cdot$$(4$$\frac{3}{66}$$ - 3$$\frac{14}{66}$$) = 0,6$$\cdot$$(1$$\frac{3}{66}$$ - $$\frac{14}{66}$$) = 0,6$$\cdot$$\frac{55}{66}$$ = 0,6$$\cdot$$\frac{5}{6}$$ = $$\frac{3}{6}$$ = 0,5 в) (5$$\frac{3}{14}$$) = $$\frac{73}{14}$$