\(\left(4\dfrac{4}{23}+3\dfrac{11}{17}\right)-\left(2\dfrac{4}{23}+1\dfrac{11}{17}\right)\)

\(=\left(\dfrac{96}{23}+\dfrac{62}{17}\right)-\left(\dfrac{50}{23}+\dfrac{28}{17}\right)\)

\(=\dfrac{96}{23}+\dfrac{62}{17}-\dfrac{50}{23}-\dfrac{28}{17}\)

\(=\left(\dfrac{96}{23}-\dfrac{50}{23}\right)+\left(\dfrac{62}{17}-\dfrac{28}{17}\right)\)

\(=2+2\)

\(=4\)

sắp xếp thứ tự từ lớn đến bé 

a , 6/11 ; 23/33 ; 2/3

⇒ \(\dfrac{22}{33};\dfrac{2}{3};\dfrac{6}{11}\)

b , 8/9 ; 8/11 ; 9/8 

⇒ \(\dfrac{9}{8};\dfrac{8}{9};\dfrac{8}{11}\)