$\frac{2}{3}\cdot9$

$9\div\frac{2}{3}$

$\frac{1}{2}\cdot9$

$9\div\frac{1}{2}$

$\frac{1}{3}\cdot\frac{1}{2}$

$\frac{1}{3}\div\frac{1}{2}$

$\frac{3}{4}\cdot6$

$6\div\frac{3}{4}$

$8\cdot\frac{1}{4}$

$8\div\frac{1}{4}$

$4\cdot\frac{1}{2}$

$4\div\frac{1}{2}$

$3\div\frac{1}{3}$

$3\cdot\frac{1}{3}$

$4\div\frac{1}{4}$

$4\cdot\frac{1}{4}$

$2\cdot\frac{1}{2}$

$2\div\frac{1}{2}$

$\frac{1}{2}\div2$