Question

Tính

Answer 1

`d)(-1/31):(-7)=(-1/31).(-1/7)=1/217`

`e)5:2/3=5 . 3/2=15/2`

Answer 2

=1/217

=15/2

Answer 3

d: \(=\dfrac{1}{31}\cdot\dfrac{1}{7}=\dfrac{1}{217}\)

e: =5x3/2=15/2

Answer 4

`(-1)/31 : (-7)`

`=(-1)/31 xx (-1)/7`

` = (-1.(-1)/(31.7)`

`=1/217`

___________________

`5:2/3`

`=5 xx 3/2`

`=(5.3)/2`

`=15/2`