Đáp án:
$\dfrac{-9}{10}$
Giải thích các bước giải:
$\dfrac{-5}{16}:0,125+1,456:\dfrac{7}{25}-4\dfrac{1}{2}.0,8$
$=\dfrac{-5}{16}:\dfrac{1}{8}+\dfrac{182}{125}.\dfrac{25}{7}-\dfrac{9}{2}.\dfrac{4}{5}$
$=\dfrac{-5}{16}.8+\dfrac{182.25}{125.7}-\dfrac{9.4}{2.5}$
$=\dfrac{-40}{16}+\dfrac{26.7.25}{25.5.7}-\dfrac{36}{10}$
$=\dfrac{-5}{2}+\dfrac{26}{5}-\dfrac{18}{5}$
$=\dfrac{-5}{2}+\dfrac{8}{5}$
$=\dfrac{-25}{10}+\dfrac{16}{10}$
$=\dfrac{-9}{10}$
