Question

-20/3 + 2/3 - 3/23 + 2/5 +7/15

 

Answer 1

=-20/3+2/3-3/23+2/5+7/15

=-6+6/15+7/15-3/23

=-6+13/15-3/23

=-77/15-3/23

=-1816/345

Answer 2

`-20/3+2/3-3/23+2/5+7/15`

`=(-20/3+2/3)-3/23+(2/5+7/15)`

`=-18/3-3/23+(6/15+7/15)`

`=-6-3/23+13/15`

`=-138/23-3/23+13/15`

`=-141/23+13/15`

`=-2115/345+299/345`

`=-1816/345`