Đáp án:
$\dfrac{0,8:(\dfrac{4}{5}×1,25)}{0,64-\dfrac{1}{25}}+\dfrac{(1,08-\dfrac{2}{25})}{(6\dfrac{5}{9}-3\dfrac{1}{4})×2\dfrac{2}{17}}+(1,2×0,5):\dfrac{4}{5}$
$=\dfrac{0,8:1}{0,64-0,04}+\dfrac{(1,08-0,08):\dfrac{4}{7}}{\dfrac{119}{36}×\dfrac{36}{17}}+0,6:\dfrac{4}{5}$
$=\dfrac{0,8}{0,6}+\dfrac{1×\dfrac{7}{4}}{7}+\dfrac{3}{4}$
$=\dfrac{8}{6}+\dfrac{1}{4}+\dfrac{3}{4}=2 \dfrac{1}{3}$
