a \(\dfrac{3}{5}:\left(\dfrac{-1}{15}-\dfrac{1}{6}\right)+\dfrac{3}{5}:\left(\dfrac{-1}{3}-1\dfrac{1}{15}\right)\)
b\(\left\{\left[6,2:0,31-\dfrac{5}{6}.0,9.0,2+0,15\right]:0,2\right\}\left[\left(2+1\dfrac{4}{11}.0,22:0,1\right):\dfrac{1}{33}\right]\)
mong mọi người giúp đỡ
a) \(\dfrac{3}{5}:\left(\dfrac{-1}{15}-\dfrac{1}{6}\right)+\dfrac{3}{5}:\left(\dfrac{-1}{3}-1\dfrac{1}{15}\right)\)
\(=\dfrac{3}{5}:\left(\dfrac{-1}{15}-1\dfrac{1}{15}-\dfrac{1}{6}+\dfrac{-2}{6}\right)\)
\(=\dfrac{3}{5}:\left(\dfrac{-17}{15}-\dfrac{1}{6}\right)\)
\(=\dfrac{3}{5}\cdot\dfrac{-10}{13}\)
\(=\dfrac{-6}{13}\)