Tính: 19/6 - 2/6

* Hướng dẫn giải

$\begin{array}{l}a)\frac{17}{6}\\ \\ b)\frac{-43}{30}\\ \\ c)\frac{-5}{36}\end{array}$

$\begin{array}{l}d)\frac{9}{20}.\\ \\ e)\frac{11}{3}.\\ \\ f)\frac{1}{12}\end{array}$