Question

  

Answer 1

Bài 3

\(a,=\dfrac{9}{5}\times\left(\dfrac{7}{13}+\dfrac{6}{13}\right)\\ =\dfrac{9}{5}\times\dfrac{13}{13}\\ =\dfrac{9}{5}\times1\\ =\dfrac{9}{5}\\ b,=\left(-\dfrac{4}{5}\right)\times\left(37+62+1\right)\\ =\left(-\dfrac{4}{5}\right)\times100\\ =\dfrac{-400}{5}\\ =-80\)

Answer 2

`9/5 . 7/13 + 9/5 . 6/13 `

 

`= 9/5 . ( 7/13 + 6/13 ) `

 

`= 9/5 . 1 = 9/5 `

 

`-4/5. 37 + (-4)/5 . 62 +(-4)/5`

 

` =-4/5 . ( 37+62+1 ) `

 

`=-4/5 . 100 = -80`