nước

\(x\times\dfrac{3}{5}=\dfrac{11}{15}:\dfrac{1}{2}\)

\(x\times\dfrac{3}{5}=\dfrac{11}{15}\times\dfrac{2}{1}\)

\(x\times\dfrac{3}{5}=\dfrac{22}{15}\)

\(x=\dfrac{22}{15}:\dfrac{3}{5}\)

\(x=\dfrac{22}{15}\times\dfrac{5}{3}=\dfrac{22}{3}\times\dfrac{1}{3}\)

\(x=\dfrac{22}{9}\)

Chúc bạn học tốt:>

\(5:\dfrac{2}{3}\)\(=5\times\dfrac{3}{2}=\dfrac{5\times3}{2}=\dfrac{15}{2}\)

______________________________

\(\dfrac{4}{7}+\dfrac{2}{5}=\dfrac{20}{35}+\dfrac{14}{35}=\dfrac{34}{35}\)

______________________________

\(1-\dfrac{17}{21}=\dfrac{21}{21}-\dfrac{17}{21}=\dfrac{4}{21}\)

Chúc bạn học tốt:>

\(6\times x=\dfrac{5}{8}:\dfrac{3}{4}\)

\(6\times x=\dfrac{5}{8}\times\dfrac{4}{3}\)

\(6\times x=\dfrac{20}{24}\)

      \(x=\dfrac{20}{24}:6\)

     \(x=\dfrac{20}{24}\times\dfrac{144}{24}=\dfrac{5}{1}\times\dfrac{6}{6}\)

     \(x=5\)

Chúc bạn học tốt:>

\(\dfrac{14}{5}\times\dfrac{3}{4}-\dfrac{4}{5}\times\dfrac{3}{4}\)

\(=\dfrac{3}{4}\times\left(\dfrac{14}{5}-\dfrac{4}{5}\right)\)

\(=\dfrac{3}{4}\times2\)

\(=\dfrac{3\times2}{4}\)

\(=\dfrac{6}{4}=\dfrac{3}{2}\)

Chúc bạn học tốt:>

vào đâu?

oa, ghê nhỉ:))