( Bạn chú ý tách nhỏ ra để cho mọi người dễ làm và trả lời nhanh nhất có thế nhé)
\(y,\dfrac{4}{9}.\left(-7,5:3\dfrac{1}{8}\right)\)
\(=\dfrac{4}{9}.\left(\dfrac{-15}{2}:\dfrac{25}{8}\right)\)
\(=\dfrac{4}{9}.\left(\dfrac{-15}{2}.\dfrac{8}{25}\right)\)
\(=\dfrac{4}{9}.\left(\dfrac{\left(-3\right).4}{1.5}\right)\)
\(=\dfrac{4}{9}.\dfrac{-12}{5}\)
\(=\dfrac{4.\left(-4\right)}{3.5}\)
\(=\dfrac{-16}{15}\)
\(x,\left(2\dfrac{2}{15}.\dfrac{9}{17}.\dfrac{3}{32}\right):\left(-\dfrac{3}{17}\right)\)
\(=\left(\dfrac{32}{15}.\dfrac{9}{17}.\dfrac{3}{32}\right).\dfrac{-17}{3}\)
\(=\left(\dfrac{1.9.1}{5.17.1}\right).\dfrac{-17}{3}\)
\(=\dfrac{9}{85}.\dfrac{-17}{3}\)
\(=\dfrac{3.\left(-1\right)}{5.1}\)
\(=\dfrac{-3}{5}\)
\(z,\left(\dfrac{-5}{9}\right).\dfrac{3}{11}+\left(-\dfrac{13}{18}\right).\dfrac{3}{11}\)
\(=\dfrac{3}{11}.\left(\dfrac{-5}{9}+\dfrac{-13}{18}\right)\)
\(=\dfrac{3}{11}.\left(\dfrac{-10}{18}-\dfrac{13}{18}\right)\)
\(=\dfrac{3}{11}.\dfrac{-23}{18}\)
\(=\dfrac{1.\left(-23\right)}{11.6}\)
\(=\dfrac{-23}{66}\)
\(j,\dfrac{3}{7}.19\dfrac{1}{3}+\dfrac{3}{7}.40\dfrac{1}{-3}+\dfrac{-1}{5}\)
\(=\dfrac{3}{7}.\dfrac{58}{3}+\dfrac{3}{7}.\dfrac{-121}{3}-\dfrac{1}{5}\)
\(=\dfrac{3}{7}.\left(\dfrac{58}{3}+\dfrac{-121}{3}\right)-\dfrac{1}{5}\)
\(=\dfrac{3}{7}.\dfrac{-63}{3}-\dfrac{1}{5}\)
\(=\dfrac{3}{7}.\left(-21\right)-\dfrac{1}{5}\)
\(=\dfrac{3.\left(-3\right)}{1}-\dfrac{1}{5}\)
\(=\left(-9\right)-\dfrac{1}{5}\)
\(=\dfrac{-45}{5}-\dfrac{1}{5}\)
\(=\dfrac{-46}{5}\)
