Bài 1 Tính 34/-13(1/3-5/6) : 17/26 + 1/2 (1/5 - 3/4) -3/4(1/8-3/2) -5/4 : (1/2-5/4)-1/3 7/10:(3/5-1/15).(-8/9) -1/3 (1/2-1/4) -5/7 : (1/21-3/7). (3/-10) -1/5 (-10/3) MỌI NGƯỜI GIÚP MÌNH Ạ MÌNH ĐANG CẦN GẤP Ạ CẢM ƠN MỌI NGƯỜI

`34/-13(1/3-5/6) : 17/26 + 1/2 (1/5 - 3/4)`

`= 34/-13 * (1/3 - 5/6) : 17/26 + 1/2 * (1/5 - 3/4)`

`= -34/13 * (-1/6) : 17/26 + 1/2 * (-17/20)`

`= 34/78 * 26/17 - 17/40`

`= 2/3 - 17/40`

`= 29/120`

``

`-3/4(1/8-3/2) -5/4 : (1/2-5/4)-1/3`

`= -3/4 * (1/8 - 3/2) - 5/4 : (1/2 - 5/4) - 1/3`

`= 45/32 - 5/4 : (-3/4) - 1/3`

`= 5/32 : (-3/4) - 1/3`

`= 5/32 * (-4/3) - 1/3`

`= -20/96 - 1/3`

`= -13/24`

``

`7/10:(3/5-1/15).(-8/9) -1/3 (1/2-1/4)`

`= 7/10 : (8/15) * (-8/9) - 1/3 * (2/4 - 1/4)`

`= 7/10 : (8/15) * (-8/9) - 1/3 * (1/4)`

`= 7/10 * (-15/8) * (-8/9) - 1/3 * (1/4)`

`= 105/72 - 1/3 * (1/4)`

`= 35/24 - 1/12`

`= 11/8`

`@Sad2006`