Thực hiện các phép tính sau: 4 ( 5/23).2(13/5)

* Hướng dẫn giải

$\begin{array}{l}a\left)\frac{97}{5}\begin{array}{cccc}& & & \end{array}b\right)\frac{48}{35}\\ \\ c)-\frac{37}{3}.\begin{array}{cccc}& & & \end{array}d)\frac{-19}{39}\end{array}$

$\begin{array}{l}e\left)\frac{17}{2}\begin{array}{cccc}& & & \end{array}f\right)\frac{34}{49}\\ \\ g)\frac{568}{9}.\begin{array}{cccc}& & & \end{array}h)\frac{142}{27}\end{array}$