-11/24:17/23-11/24:17/11-1/12

Đáp án:

$-\dfrac{11}{24}:\dfrac{17}{23}-\dfrac{11}{24}:\dfrac{17}{11}-\dfrac{1}{12}$

$= -\dfrac{11}{24}.\dfrac{23}{17}-\dfrac{11}{24}.\dfrac{11}{17}-\dfrac{1}{12}$

`= (-\frac{11}{24}).(\frac{23}{17}+\frac{11}{17})-\frac{1}{12}`

`= (-\frac{11}{24}).2-\frac{1}{12}`

`= \frac{-11}{12}-\frac{1}{12}`

`=\frac{-12}{12}`

`=-1`