Question

tính nhanh 6/9+5/7+1/3=?

giúp minh với mọi người 

 

Answer 1

\(\dfrac{6}{9}+\dfrac{5}{7}+\dfrac{1}{3}=\dfrac{2}{3}+\dfrac{5}{7}+\dfrac{1}{3}=\left(\dfrac{2}{3}+\dfrac{1}{3}\right)+\dfrac{5}{7}\)

                                            \(=1+\dfrac{5}{7}=\dfrac{12}{7}\)

Answer 2

12/7