Question

\(\dfrac{1}{5}+\dfrac{4}{11}+\dfrac{4}{5}+\dfrac{7}{11}=?\)

Có điểm SP ai làm được thì mới đc tick

ko lm đc thì phắng 

OK ?

Answer 1

\(\dfrac{1}{5}+\dfrac{4}{11}+\dfrac{4}{5}+\dfrac{7}{11}=\left(\dfrac{1}{5}+\dfrac{4}{5}\right)+\left(\dfrac{7}{11}+\dfrac{4}{11}\right)=\dfrac{5}{5}+\dfrac{11}{11}=1+1=2\)

Answer 2

\(\dfrac{1}{5}+\dfrac{4}{11}+\dfrac{4}{5}+\dfrac{7}{11}\\ =\left(\dfrac{1}{5}+\dfrac{4}{5}\right)+\left(\dfrac{4}{11}+\dfrac{7}{11}\right)\\ =1+1\\ =2\)

Answer 3

dậy chưa ?