Giúp vs mấy bồT-T
\(\dfrac{0,8:\left(\dfrac{4}{5}.1,25\right)}{0,64-\dfrac{1}{25}}+\dfrac{\left(100-\dfrac{2}{25}\right):\dfrac{4}{7}}{\left(6\dfrac{5}{9}-3\dfrac{1}{4}\right).2\dfrac{2}{27}}+\left(1,2.0,5\right):\dfrac{3}{5}\) \(=\dfrac{\dfrac{4}{5}:\left(\dfrac{4}{5}.\dfrac{5}{4}\right)}{\dfrac{16}{25}-\dfrac{1}{25}}+\dfrac{\left(100-\dfrac{2}{25}\right):\dfrac{4}{7}}{\left(\dfrac{59}{9}-\dfrac{13}{4}\right).\dfrac{56}{27}}+\left(\dfrac{6}{5}.\dfrac{1}{2}\right):\dfrac{3}{5}\)
=\(\dfrac{\dfrac{4}{5}}{\dfrac{3}{5}}+\dfrac{100:\dfrac{4}{7}-\dfrac{2}{25}:\dfrac{4}{7}}{\dfrac{59}{9}.\dfrac{56}{27}-\dfrac{13}{4}.\dfrac{56}{27}}+\dfrac{3}{5}:\dfrac{3}{5}\)
\(=\dfrac{\dfrac{4}{5}}{\dfrac{3}{5}}+\dfrac{175-\dfrac{7}{50}}{\dfrac{3304}{243}-\dfrac{182}{27}}+\dfrac{3}{5}.\dfrac{5}{3}\)
\(=\dfrac{\dfrac{4}{5}}{\dfrac{3}{5}}+\dfrac{\dfrac{8743}{50}}{\dfrac{1666}{243}}+1\)
\(=\dfrac{\dfrac{40}{50}}{\dfrac{729}{1215}}+\dfrac{\dfrac{8743}{50}}{\dfrac{8330}{1215}}+1\)
\(=\dfrac{\dfrac{8783}{50}}{\dfrac{9059}{1215}}+1\)
\(=\dfrac{\dfrac{8783}{50}}{\dfrac{9059}{1215}}+\dfrac{\dfrac{9059}{1215}}{\dfrac{9059}{1215}}=\dfrac{8783}{50}.\dfrac{1215}{9059}+\dfrac{9059}{1215}.\dfrac{1215}{9059}\)
\(=\dfrac{1215}{9059}\left(\dfrac{8783}{50}+\dfrac{9059}{1215}\right)\)
\(=\dfrac{1215}{9059}\left(\dfrac{2134264}{12150}+\dfrac{90590}{12150}\right)\)
\(=\dfrac{1215}{9059}.\dfrac{2224854}{12150}\)
\(=\dfrac{1}{9059}.\dfrac{2224854}{10}=\dfrac{2224854}{90590}=\dfrac{1112427}{45295}\)
Sao rối thế? À mà đây là toán lớp mấy vậy bạn?
