[tex]80\frac{7}{10} -20\frac{9}{10}[/tex]
[tex]36\frac{2}{9} - 25\frac{5}{9}[/tex]
[tex]19\frac{7}{12} - 7\frac{11}{12}[/tex]
[tex]6\frac{1}{6} -4\frac{5}{6}[/tex]
pls give answer and solution