$\dfrac{3}{13}\times\dfrac{5}{2}$ =

$19 \times\dfrac{2}{19}$ =

$\dfrac{12}{11}\times\dfrac{9}{15}$ =

$\dfrac{17}{6}\times\dfrac{1}{5}$ =

$\dfrac{7}{25}\times\dfrac{15}{11}$ =

$\dfrac{3}{19}\times\dfrac{7}{2}$ =

$\dfrac{-13}{2}\times\dfrac{3}{-7}$ =

$\dfrac{3}{46}\times 7$ =

$-7 \times\dfrac{35}{49}$ =

$\dfrac{5}{3}\times\dfrac{10}{4}$ =