Mẫu đề thi tự luận

\[\begin{align} & A=-5,13:\left( 5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63} \right) \\ & =-5,13:\left( 5\frac{5}{28}-\frac{85}{36}+1\frac{16}{63} \right) \\ & =-5,13:4\frac{1}{14}=-1,26. \\ & B=\left( 3\frac{1}{3}.1,9+19,5:4\frac{1}{3} \right).\left( \frac{62}{75}-\frac{4}{25} \right) \\ & =\left( \frac{10}{3}.\frac{19}{10}+\frac{195}{10}.\frac{3}{13} \right).\frac{2}{3} \\ & =\frac{65}{9}\approx 7,(2) \\ \end{align}\]