\(...-\dfrac{1}{24}-\left[\dfrac{1}{4}--\dfrac{3}{8}\right]=-\dfrac{1}{24}-\dfrac{5}{8}=-\dfrac{2}{3}\)
\(-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)
\(=-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{4}{8}-\dfrac{7}{8}\right)\right]\)
\(=-\dfrac{1}{24}-\left(\dfrac{1}{4}+\dfrac{3}{8}\right)\)
\(=-\dfrac{1}{24}-\left(\dfrac{2}{8}+\dfrac{3}{8}\right)\)
\(=-\dfrac{1}{24}-\dfrac{5}{8}\)
\(=-\dfrac{1}{24}-\dfrac{15}{24}\)
\(=\dfrac{-16}{24}\)
\(=-\dfrac{2}{3}\)
\(\dfrac{-1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)
\(=\dfrac{-1}{24}-\left[\dfrac{1}{4}\left(\dfrac{4}{8}-\dfrac{7}{8}\right)\right]\)
\(=\dfrac{-1}{24}-\left[\dfrac{1}{4}.\dfrac{-3}{8}\right]\)
\(=\dfrac{-1}{24}-\dfrac{-3}{32}\)
\(=\dfrac{-1}{24}+\dfrac{3}{32}\)
\(=\dfrac{5}{96}\)
Chúc bạn học tốt
\(\dfrac{-1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)
=\(\dfrac{-1}{24}-\left[\dfrac{1}{4}-\dfrac{-1}{8}\right]\)
=\(\dfrac{-1}{24}-\dfrac{3}{8}\)
=\(\dfrac{-5}{12}\)
\(-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]=-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{4}{8}-\dfrac{7}{8}\right)\right]\)
\(=\dfrac{1}{24}-\left[\dfrac{1}{4}-\dfrac{3}{8}\right]=\dfrac{1}{24}-\left[\dfrac{2}{8}-\dfrac{3}{8}\right]=\dfrac{1}{24}+\dfrac{1}{8}=\dfrac{1}{24}+\dfrac{3}{24}=\dfrac{4}{24}=\dfrac{1}{6}\)