\(\left(\dfrac{4}{5}+\dfrac{1}{2}\right):\left(\dfrac{3}{13}-\dfrac{8}{13}\right)\)
= \(\left(\dfrac{8}{10}+\dfrac{5}{10}\right):\dfrac{-5}{13}\)
= \(\dfrac{13}{10}:\)\(\dfrac{-5}{13}\)
= \(\dfrac{13}{10}.\dfrac{13}{-5}\)
= \(\dfrac{-169}{50}\)
Chúc bạn học tốt !
(\(\dfrac{4}{5}\)+\(\dfrac{1}{2}\)):(\(\dfrac{3}{13}\)-\(\dfrac{8}{13}\))
=(\(\dfrac{4\times2}{5\times2}\)+\(\dfrac{1\times5}{2\times5}\)):\(\dfrac{3-8}{13}\)
=(\(\dfrac{8}{10}+\dfrac{5}{10}\)):\(\dfrac{-5}{13}\)
=\(\dfrac{13}{10}\):\(\dfrac{-5}{13}\)=\(\dfrac{13}{10}\times\dfrac{13}{-5}\)=\(\dfrac{169}{-50}\)=\(\dfrac{-169}{50}\)
Đúng ko bạn chắc sai rồi nhỉ........
\(\left(\dfrac{4}{5}+\dfrac{1}{2}\right):\left(\dfrac{3}{13}-\dfrac{8}{13}\right)\)
= \(\left(\dfrac{8}{10}+\dfrac{5}{10}\right)\) : \(\left(\dfrac{3-8}{13}\right)\)
= \(\dfrac{13}{10}:\dfrac{-5}{13}\)
=\(\dfrac{13}{10}\cdot\dfrac{13}{-5}\)
= \(\dfrac{169}{-50}\) = \(\dfrac{-169}{50}\).
CHÚC BN HỌC GIỎI!!!
\((\dfrac{4}{5}+\dfrac{1}{2})\div(\dfrac{3}{13}-\dfrac{8}{13})\)
\(=(\dfrac{8}{10}+\dfrac{5}{10})\div\dfrac{-5}{13}\)
\(=\dfrac{13}{10}\div\dfrac{-5}{13}\)
\(=\dfrac{13}{10}\times\dfrac{13}{-5}\)
\(=\dfrac{169}{-50}\) hay\(-\dfrac{169}{50}\)