Question

tính nhanh
\(\dfrac{6}{11}\)+\(\dfrac{2}{5}\)+\(\dfrac{16}{11}\)+\(\dfrac{19}{13}\)+\(\dfrac{3}{5}\)+\(\dfrac{7}{13}\)

Answer 1

`6/11+2/5+16/11+19/13+3/5+7/13`

`=(6/11+16/11)+(2/5+3/5)+(19/13+7/13)`

`=22/11+5/5+26/13`

`=2+1+2=5`

Answer 2

\(=\left(\dfrac{6}{11}+\dfrac{16}{11}\right)+\left(\dfrac{2}{5}+\dfrac{3}{5}\right)+\left(\dfrac{19}{13}+\dfrac{7}{13}\right)\)

\(=2+1+2\)

\(=5\)