Question

(-3/5+5/6):4/7+(1/6+2/-5):4/7

Giúp mik vớiiiiiiii!

Answer 1

`=-3/5 + 5/6 . 7/4 + 1/6 + 2/-5 . 7/4`

`=7/4 (-3/5 + 5/6 + 1/6 + 2/-5)`

`=7/4 . 0`

`=0`

Answer 2

\(\left(\dfrac{-3}{5}+\dfrac{5}{6}\right):\dfrac{4}{7}+\left(\dfrac{1}{6}+\dfrac{2}{-5}\right):\dfrac{4}{7}\)
=\(\left(\dfrac{-18}{30}+\dfrac{25}{30}\right).\dfrac{7}{4}+\left(\dfrac{5}{30}+\dfrac{-12}{30}\right).\dfrac{7}{4}\)
= \(\dfrac{7}{30}.\dfrac{7}{4}+\dfrac{-7}{30}.\dfrac{7}{4}\)
= \(\dfrac{7}{4}.\left(\dfrac{7}{30}+\dfrac{-7}{30}\right)\)
= \(\dfrac{7}{4}\)