-1 + 3 - 7 3 8 12 1- 2 - 11 4 3 18 đây là phân số nhé

2 câu trả lời

`-1/3` `+` `3/8` - `7/12` 

`=` `-8/24` `+` `9/24` - `14/24`

`=` $\dfrac{-8 + 9 - 14}{24}$ 

`=` $\dfrac{-13}{24}$ 

`----`

`1/4` `-` `2/3` `-` `11/18` 

`=` `9/36` `-` `24/36` `-` `22/36`

`=` $\dfrac{9 - 24 - 22}{36}$ 

`=` $\dfrac{-37}{36}$ 

`( - 1 )/3 + 3/8 - 7/12`

`= ( - 8 )/24 + 9/24 - 14/24`

`= 1/24 - 14/24`

`= ( - 13 )/24`

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`1/4 - 2/3 - 11/18`

`= 9/36 - 24/36 - 22/36`

`= ( - 15 )/36 - 22/36`

`= ( - 37 )/36`