Question

Answer 1

`2 3/5 xx 1 1/4+5/2`

`= 13/5 xx 5/4 + 5/2`

`= 65/20 + 5/2`

`=65/20 + 50/20`

`=115/20`

`= 23/4`

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

`16/6: 2 1/6: 1 1/7`

`= 16/6 : 13/6 : 8/7`

`= 16/6 xx 6/13 xx 7/8`

`=(16 xx 6 xx 7)/(6xx13xx8)`

`= 672/624`

`= 14/13` 

Answer 2

a: \(=\dfrac{13}{5}\cdot\dfrac{5}{4}+\dfrac{5}{2}=\dfrac{13}{4}+\dfrac{10}{4}=\dfrac{23}{4}\)

b: \(=\dfrac{8}{3}:\dfrac{7}{6}:\dfrac{8}{7}=\dfrac{8}{3}\cdot\dfrac{6}{7}\cdot\dfrac{7}{8}=2\)