[tex]-0,81:\frac{9}{10} +5*0,48=-\frac{81}{100} :\frac{9}{10}+5*\frac{48}{100} =-\frac{81}{100}*\frac{10}{9}+5*\frac{48}{100}=-\frac{9}{10}*\frac{1}{1}+5*\frac{24}{50}=-\frac{9}{10} +\frac{120}{50} =-\frac{9}{10}+\frac{24}{10} =\frac{15}{10}=1\frac{5}{10} =1\frac{1}{2}[/tex]
