$6 \times\dfrac{13}{39}$ =

$\dfrac{10}{7}\times\dfrac{11}{12}$ =

$\dfrac{7}{-2}\times\dfrac{-5}{2}$ =

$\dfrac{5}{22}\times\dfrac{3}{2}$ =

$\dfrac{5}{42}\times 5$ =

$11 \times\dfrac{15}{-33}$ =

$\dfrac{19}{23}\times\dfrac{3}{6}$ =

$\dfrac{2}{3}\times\dfrac{23}{7}$ =

$\dfrac{3}{22}\times\dfrac{15}{4}$ =

$\dfrac{7}{10}\times\dfrac{9}{15}$ =