Đáp án + giải thích bước giải :
`13/15 - 2/7 - (-2)/15 + 13/4 - |-1/2| - 8/17 - 1/6`
`= 13/15 - 2/7 + 2/15 + 13/4 - 1/2 - 8/17 - 1/6`
`= 61/105 + 2/15 + 13/4 - 1/2 - 8/17 - 1/6`
`= 5/7 + 13/4 - 1/2 - 8/17 - 1/6`
`= 111/28 - 1/2 - 8/17 - 1/6`
`= 97/28 - 8/17 - 1/6`
`= 1425/476 - 1/6`
`= 361/714`