Question

9/5 + ( 1/2 + 6/5 ) 

Answer 1

\(9/5+(1/2+6/5)=(9/5+6/5)+1/2=15/5+1/2=3+1/2=6/2+1/2=7/2\) nhé =)

Answer 2

\(\dfrac{9}{5}+\left(\dfrac{1}{2}+\dfrac{6}{5}\right)=\dfrac{9}{5}+\dfrac{1}{2}+\dfrac{6}{5}=\dfrac{15}{5}+\dfrac{1}{2}=\dfrac{30}{10}+\dfrac{5}{10}=\dfrac{35}{10}=\dfrac{7}{2}\)

Answer 3

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

\(\dfrac{9}{5}+\dfrac{17}{10}\)

\(\dfrac{18}{10}+\dfrac{17}{10}\)=\(\dfrac{35}{10}\)