Tính giá trị của biểu thức.

\(\left( {\dfrac{{ - 2}}{{ - 5}}:\dfrac{3}{{ - 4}}} \right).\dfrac{4}{5}\)

\(\dfrac{{ - 1}}{7}\) 

\(\dfrac{{ - 1}}{{14}}\)  

\(\dfrac{4}{{ - 56}}\)         

\(\dfrac{{ - 1}}{{70}}\)    

\(\dfrac{a}{0}\)

\(\dfrac{0}{a}\)

\(\dfrac{a}{1}\)

\(\dfrac{1}{a}\)

$\dfrac{5}{8}$                         

$\dfrac{8}{{ - 5}}$                            

$\dfrac{{ - 5}}{8}$                          

$ - 5,8$

$\dfrac{1}{3}$                     

\(\dfrac{4}{3}\)  

\(\dfrac{3}{4}\)                 

\(1\)

$\dfrac{{1123}}{{1125}} > 1$           

\(\dfrac{{ - 154}}{{ - 156}} < 1\)               

\(\dfrac{{ - 123}}{{345}} > 0\)           

\(\dfrac{{ - 657}}{{ - 324}} < 0\)

$8$ 

\(\dfrac{9}{5}\)  

\(\dfrac{3}{5}\)          

\(2\)