\(=\dfrac{\left(\dfrac{34}{100}-\dfrac{1}{25}\right)\cdot\dfrac{2}{5}}{\dfrac{4}{5}:\left(\dfrac{4}{5}\cdot\dfrac{5}{4}\right)}-\left(\dfrac{6}{5}\cdot\dfrac{7}{20}\right)\cdot\dfrac{-5}{4}\)
\(=\dfrac{\dfrac{3}{10}\cdot\dfrac{2}{5}}{\dfrac{4}{5}}-\dfrac{42}{100}\cdot\dfrac{-5}{4}\)
\(=\dfrac{3}{25}:\dfrac{4}{5}+\dfrac{42}{100}\cdot\dfrac{5}{4}\)
\(=\dfrac{3}{25}\cdot\dfrac{5}{4}+\dfrac{42}{100}\cdot\dfrac{5}{4}=\dfrac{5}{4}\cdot\dfrac{54}{100}=\dfrac{270}{400}=\dfrac{27}{40}\)
Đúng 1
Bình luận (1)
