Question

Answer 1

`7/19 xx 1/3 + 7/19 xx 2/3= 7/19 xx ( 1/3+2/3)=7/19xx1=7/19`

`--------------`

`x xx 1/2= 1/3`

`=>x= 1/3 : 1/2`

`=>x= 1/3 xx 2`

`=>x=2/3`

`-----------`

`x:4/5=5/2`

`=>x= 5/2 xx 4/5`

`=>x= 20/10= 2`

`-------------`

`2/9 : x= 2/3`

`=>x= 2/9 : 2/3`

`=>x= 2/9 xx 3/2`

`=>x= 6/18=1/3`

Answer 2

 

 

Answer 3

b1:

= \(\dfrac{7}{19} \left(\dfrac{1}{3}+\dfrac{2}{3}\right)\)

= \(\dfrac{7}{19}\times1\)

= \(\dfrac{7}{19}\)

b2 :

x = \(\dfrac{1}{3}\div\dfrac{1}{2}\)

x = \(\dfrac{2}{3}\)

b3 :

x = \(\dfrac{5}{2}\times\dfrac{4}{5}\)

x = 2

b4 :

x = \(\dfrac{2}{9}\div\dfrac{2}{3}\)

x = \(\dfrac{1}{3}\)