Question

Tính:

a)  \(\dfrac{{ - 8}}{9}:\dfrac{4}{3}\)

b) \(\left( { - 2} \right):\dfrac{2}{5}\)

Answer 1

a) \(\dfrac{-8}{9}:\dfrac{4}{3}=\dfrac{-8}{9}.\dfrac{3}{4}=\dfrac{\left(-8\right).3}{9.4}=\dfrac{-24}{36}=\dfrac{-2}{3}\)

b) \(\left(-2\right):\dfrac{3}{5}=\left(-2\right).\dfrac{5}{2}=\dfrac{\left(-2\right).5}{2}=\dfrac{-10}{2}=-5\)

Answer 2

a)  \(\dfrac{{ - 8}}{9}:\dfrac{4}{3} = \dfrac{{ - 8}}{9}.\dfrac{3}{4} = \dfrac{{ - 8.3}}{{9.4}} = \dfrac{{ - 2}}{3}\)

b) \(\left( { - 2} \right):\dfrac{2}{5}\)\( = \left( { - 2} \right).\dfrac{5}{2} = \dfrac{{ - 2.5}}{2} =  - 5\)