`a)` `13/15 + 47/7 + 101/105`

`= 91/105 + 705/105 + 101/105`

`= 897/105 = 299/35`

`b)` `2/5 + 3/5 xx 4/9`

`= 2/5 + 12/45`

`= 2/5 + 4/15`

`= 6/15 + 4/15`

`= 10/15 = 2/3`

`c)` `3/4 xx 5/2 xx 7/6`

`=` `(3 xx 5 xx 7)/(4xx2xx6)`

`=` `105/48 = 35/16`

`d)` `1/2 : 1/4 : 1/6`

`= 1/2 xx 4 xx 6`

`= 2 xx 6`

`= 12`

`e)` `2/3 - 1/4 + 2/9`

`= 24/36 - 9/36 - 8/36`

`= 23/36`

`g)` `5/2 + 1/3 xx 3/2`

`= 5/2 + 3/6`

`= 5/2 + 1/2`

`= 6/2 = 3`

`color{lightblue}{#han}color{lightgreen}{gpha}color{pink}{m16}color{lightyellow}{242}`