Question

giúp mình câu này mai mình thi òi:

(4/5+ 1/2) : ( 3/13-8/13)

Answer 1

\(\left(\dfrac{4}{5}+\dfrac{1}{2}\right):\left(\dfrac{3}{13}-\dfrac{8}{13}\right)\)

= \(\left(\dfrac{8}{10}+\dfrac{5}{10}\right):\dfrac{-5}{13}\)

= \(\dfrac{13}{10}:\)\(\dfrac{-5}{13}\)

= \(\dfrac{13}{10}.\dfrac{13}{-5}\)

= \(\dfrac{-169}{50}\)

Chúc bạn học tốt !

Answer 2

(\(\dfrac{4}{5}\)+\(\dfrac{1}{2}\)):(\(\dfrac{3}{13}\)-\(\dfrac{8}{13}\))

=(\(\dfrac{4\times2}{5\times2}\)+\(\dfrac{1\times5}{2\times5}\)):\(\dfrac{3-8}{13}\)

=(\(\dfrac{8}{10}+\dfrac{5}{10}\)):\(\dfrac{-5}{13}\)

=\(\dfrac{13}{10}\):\(\dfrac{-5}{13}\)=\(\dfrac{13}{10}\times\dfrac{13}{-5}\)=\(\dfrac{169}{-50}\)=\(\dfrac{-169}{50}\)

Đúng ko bạn chắc sai rồi nhỉ........

Answer 3

-169/50 bn nha

Answer 4

\(\left(\dfrac{4}{5}+\dfrac{1}{2}\right):\left(\dfrac{3}{13}-\dfrac{8}{13}\right)\)

= \(\left(\dfrac{8}{10}+\dfrac{5}{10}\right)\) : \(\left(\dfrac{3-8}{13}\right)\)

= \(\dfrac{13}{10}:\dfrac{-5}{13}\)

=\(\dfrac{13}{10}\cdot\dfrac{13}{-5}\)

= \(\dfrac{169}{-50}\) = \(\dfrac{-169}{50}\).

CHÚC BN HỌC GIỎI!!!

Answer 5

kết quả là \(\dfrac{-169}{50}\) nhé bn!!!

Answer 6

\((\dfrac{4}{5}+\dfrac{1}{2})\div(\dfrac{3}{13}-\dfrac{8}{13})\)

\(=(\dfrac{8}{10}+\dfrac{5}{10})\div\dfrac{-5}{13}\)

\(=\dfrac{13}{10}\div\dfrac{-5}{13}\)

\(=\dfrac{13}{10}\times\dfrac{13}{-5}\)

\(=\dfrac{169}{-50}\) hay\(-\dfrac{169}{50}\)