\(\frac{7777}{8585}-\frac{77}{85}+\frac{7777}{16362}-\frac{77}{162}=\left(\frac{77}{85}-\frac{77}{85}\right)+\left(\frac{77}{162}-\frac{77}{162}\right)=0+0=0\)
\(\frac{7777}{8585}\)-\(\frac{77}{85}\)=0
\(\frac{7777}{16362}\)-\(\frac{77}{162}\)=0\(\Rightarrow\)0+0=0 nên biểu thức này bằng 0