a)
[tex]\frac{17}{20} -\frac{8}{15} =\frac{255}{300} -\frac{160}{300} =\frac{95}{300}=\frac{19}{60}[/tex]
b)
[tex]4\frac{3}{8} -5\frac{5}{6} =4\frac{9}{24} -5\frac{20}{24} =-1\frac{11}{24}[/tex]
c)
[tex]3\frac{5}{9} -1\frac{1}{2} =3\frac{10}{18} -1\frac{9}{18} =2\frac{1}{18}[/tex]
Myślę że pomogłem ;)
