Đáp án`+`Giải thích các bước giải:

 `1, (5/3 - 3/7 + 9) - (2 + 5/6 - 2/3) + (8/7 - 4/3 - 10)`

`= 5/3 - 3/7 + 9 - 2 - 5/6 + 2/3 + 8/7 - 4/3 - 10`

`= (5/3 + 2/3 - 4/3) + (8/7 - 3/7 - 5/7) + (9 - 2 - 10)`

`= 1 + 0 - 3`

`= -2`

`2, (8 - 9/4 + 2/7) - (-6 - 3/7 + 5/4) - (3 + 2/4 - 9/7)`

`= 8 - 9/4 + 2/7 + 6 + 3/7- 5/4 -3 - 2/4 + 9/7`

`= (8 + 6 - 3) + (-9/4 - 5/4 - 2/4) + (2/7 + 3/7 + 9/7)`

`= 11  - 4 + 2`

`= 9`

`***`sharksosad