a) [tex]\frac{1}{2} *\frac{5}{10} -\frac{25}{100} =\frac{5}{100} -\frac{25}{100}=-\frac{20}{100}[/tex]
b) [tex]1+\frac{2}{5} *\frac{15}{10} =1+\frac{3}{5} =\frac{8}{5}[/tex]
c) [tex]\frac{1}{2} +\frac{1}{3} *\frac{15}{10} =\frac{1}{2} +\frac{5}{10} =\frac{10}{10} =1[/tex]
d) 2:8+0,75=0,25+0,75=1
a) [tex]\frac{1}{5} +\frac{8}{10} *\frac{1}{4} =\frac{1}{5} +\frac{2}{10} =\frac{4}{10} =0,4[/tex]
b) [tex]\frac{1}{6} +\frac{12}{10} *\frac{15}{100} =\frac{1}{6} +\frac{6}{5} *\frac{3}{20} = \frac{1}{6} +\frac{3}{5} *\frac{3}{10} =\frac{1}{6} +\frac{9}{50} =\frac{26}{75}[/tex]
c) [tex]\frac{3}{10} +\frac{3}{9} *\frac{1}{2} =\frac{3}{10} +\frac{1}{3} *\frac{1}{2} =\frac{3}{10} +\frac{1}{6} =\frac{14}{30} =\frac{7}{15}[/tex]
