Question

Answer 1

`a)`

`y+ 2/3 = 5/2`

`=>y= 5/2 - 2/3`

`=>y= 11/6`

`b)`

`3 4/5 -y=18/5`

`=> 19/5 -y=18/5`

`=> y= 19/5 -18/5`

`=>y=1/5`

`c)`

`y- 4 5/6 = 2 1/6 + 5/6`

`=>y- 29/6 = 13/6 + 5/6`

`=>y- 29/6 = 18/6`

`=> y= 18/6 + 29/6`

`=>y= 47/6`

Bài `8`

`7/8 xx 3+ 5/12`

`= 21/8+ 5/12`

`= 73/24`

`---------`

`4/5+ 7/10 - 1/2`

`= 3/2-1/2`

`= 2/2=1`

`--------`

`6/9 : ( 2/3 : 3)`

`= 6/9 : ( 2/3 xx 1/3)`

`= 6/9 : 2/9`

`= 6/9 xx 9/2`

`= 54/18=3`