Giải hộ e ạ các ah chj ạ

Đáp án + Giải thích các bước giải:

`color{#99CCFF}\text{B}color{#66CCFF}\text{a}color{#33CCFF}\text{n}color{#00CCFF}\text{g}color{#00CCCC}\text{dz}color{#33CCCC}\text{thi}color{#66CCCC}\text{chh}color{#99CCCC}\text{๑•̀ㅂ•́}`

`Bài` `4:`

`1)` `(3/4-1/6):2/3`

`=7/12:2/3`

`=7/12` `.` `3/2`

`=7/8`

`2)` `(4/9-7/11):4/9`

`=-19/99` `.` `9/4`

`=-19/44`

`3)` `(21/8-3/4):3/16`

`=15/8` `.` `16/3`

`=10`

`4)` `-3/2` `.(7/3-5/3.4)`

`=-3/2` `.(7/3-20/3)`

`=-3/2` `.(-13/3)`

`=13/2`

`5)` `17/8:(27/8+11/2)`

`=17/8:71/8`

`=17/8` .`` `8/71`

`=17/71`

`6)` `3/-4:[12/-5-(-7/10)]`

`=3/-4:(-17/10)`

`=3/-4` `.(-10/17)`

`=15/34`