Resposta :

[tex]1+(\frac{1}{2}-\frac{1}{5})-(\frac{7}{4}-\frac{5}{4})= \\ \\ 1+\frac{3}{10}-\frac{1}{2}= \\ \\ \boxed{\frac{10+3-5}{10}=\frac{8}{10}=\frac{4}{5} \\}[/tex]

Outras perguntas