Question

Answer 1

`4/5 -3/5 :(1-2/3)`

`= 4/5 -3/5 : ( 3/3 -2/3)`

`= 4/5 -3/5 : 1/3`

`= 4/5 - 3/5 xx 3`

`= 4/5 - 9/5`

`= -5/5`

`=-1`

__

`3/13 . 15/11 + 3/11 . 7/13 - 3/13`

`=3/13 . 15/11 + 3/11 . 7/13 - 3/13 . 1`

`= 3/13 . ( 15/11 -1) + 3/11 . 7/13`

`= 3/13 . ( 15/11 -11/11)+ 3/11 . 7/13`

`= 3/13 . 4/11 + 3/11 . 7/13`

`=12/143 + 21/143`

`= 3/13`

` @ \color{yellow}{Le_mon}`

Answer 2

a/\(\dfrac{4}{5}-\dfrac{3}{5}:\left(1-\dfrac{2}{3}\right)\)
\(=\dfrac{4}{5}-\dfrac{3}{5}:\dfrac{1}{3}\)
\(=\dfrac{4}{5}-\dfrac{9}{5}\)
\(=-1\)
b/\(\dfrac{3}{13}\cdot\dfrac{15}{11}+\dfrac{3}{11}\cdot\dfrac{7}{13}-\dfrac{3}{13}\)
\(=\dfrac{3}{13}\cdot\dfrac{15}{11}+\dfrac{3}{13}\cdot\dfrac{7}{11}-\dfrac{3}{13}\)
\(=\dfrac{3}{13}\left(\dfrac{15}{11}+\dfrac{7}{11}-1\right)\)
\(=\dfrac{3}{13}\cdot1\)
\(=\dfrac{3}{13}\)
#Đang Bận Thở

Answer 3

bạn nên tải FQA

có AI giải bài chi tiết lắm

 

 

Answer 4

a) 4/5 - 3/5 :(1-2/3)

= 4/5-3/5: 1/3

= 4/5- 9/5

= -5/5=-1

b) 3/13 . 15/11 + 3/11. 7/13 - 3/13

=3/13.(15/11-3/11+7/13)

=3/13. 233/143

=699/1859

Answer 5

4/5-3/5:(1-2/3)=4/5-3/5:(3/3-2/3)

                       =4/5-3/5:1/3=4/5-3/5.3/1

                       =4/5-9/5=4/5+(-9/5)

                       =-5/5=-1