~ Bạn tham khảo ~
Bài 1 :
`(5/3 - 3/7+ 9 ) - ( 2 + 5/7-2/3 ) + ( 8/7 - 4/3 - 10 )`
`= 5/3 - 3/7+ 9 - 2 - 5/7+2/3 + 8/7 - 4/3 - 10`
`= (5/3 + 2/3 - 4/3) - (3/7 + 5/7 - 8/7) + (9-2-10)`
`= 1 - 0 - 3`
`= -2`
Bài 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`
`= (-9/4 - 5/4 - 2/4) + (2/7 + 3/7 + 9/7) + (8 + 6 - 3)`
`= -4 + 2 + 11`
`= 9`