Question

Giúp mình bài này với. Đề bài là tính nhanh (nếu được)

Answer 1

\(-\left(\dfrac{3}{17}+\dfrac{2}{13}\right)-\left(-\dfrac{20}{17}+\dfrac{11}{13}\right)\)

\(=-\dfrac{3}{17}-\dfrac{2}{13}+\dfrac{20}{17}-\dfrac{11}{13}\)

\(=\left(-\dfrac{3}{17}+\dfrac{20}{17}\right)-\left(\dfrac{2}{13}+\dfrac{11}{13}\right)\)

\(=1-1=0\)

Answer 2

`-(3/17+2/13)-(-20/17+11/13)`

`=-3/17-2/13+20/17-11/13`

`=(-3/17+20/17)+(-2/13-11/13)`

`=17/17 +(-13/13)`

`=1-1`

`=0`