[latex]( \frac{1}{2} + \frac{3}{5} ):\frac{9}{8} +0,4[/latex]

[latex] \frac{1}{2} + \frac{3}{5}= \frac{5+6}{10}= \frac{11}{10} [/latex] [latex] \frac{11}{10}: \frac{9}{8}= \frac{11}{10}* \frac{8}{9}= \frac{11*4}{5*9} = \frac{44}{45} [/latex] [latex] \frac{44}{45}+0,4= \frac{44}{45}+ \frac{4}{10}= \frac{44}{45}+ \frac{2}{5}= \frac{44+18}{45} = \frac{62}{45}=1 \frac{17}{45} [/latex]