$\dfrac{16}{16}+\dfrac{-25}{16}$ =

$\dfrac{27}{40}+\dfrac{6}{40}$ =

$\dfrac{3}{5}+\dfrac{-5}{35}$ =

$\dfrac{2}{9}+\dfrac{1}{18}$ =

$2+\dfrac{-32}{25}$ =

$\dfrac{1}{5}-\dfrac{1}{15}$ =

$6-\dfrac{165}{28}$ =

$\dfrac{11}{9}+\dfrac{5}{2}$ =

$\dfrac{11}{2}+\dfrac{5}{3}$ =

$\dfrac{2}{6}-\dfrac{1}{18}$ =