\(3080dm^3>0,308m^3\)

\(324,82+312,25=637,07\)

\(5,67m^3-4690dm^3=5,67m^3-4,69m^3=0,98m^3\)

\(\left(-225,65\right)-\left(87,51-99,9\right)\\ =-225,65-87,51+99,9\\ =-313,65+99,9\\ =-213,26\)

\(2144cm^3=0,002144m^3\)

\(\dfrac{50}{70}=\dfrac{50:10}{70:10}=\dfrac{5}{7}\\ \dfrac{24}{120}=\dfrac{24:24}{120:24}=\dfrac{1}{5}\)

\(\dfrac{9}{48}=\dfrac{3}{16}\\ \dfrac{4}{9}< \dfrac{9}{4}\)

\(\dfrac{2}{3}+\dfrac{1}{6}-\dfrac{1}{12}=\dfrac{8}{12}+\dfrac{2}{12}-\dfrac{1}{12}=\dfrac{8+2-1}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)