phép nhân phân số: 5/24 x 8/25 =

\(\begin{array}{*{20}{c}}5\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{25}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{14}\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{22}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{21}\\\hline{22}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{ar\(\begin{array}{*{20}{c}}6\\\hline{13}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{26}\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{array}\)ray}\)

\(\begin{array}{*{20}{c}}7\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{24}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{20}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{25}\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{22}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{20}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}6\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{20}\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{16}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{22}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{20}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{12}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{16}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{18}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{24}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{21}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{14}\end{array}\)

\[\begin{array}{*{20}{c}}{16}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{15}\end{array}\]

\(\begin{array}{*{20}{c}}8\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{21}\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{22}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{25}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{18}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{14}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{14}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline3\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{28}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{15}\\\hline{56}\end{array}\)

\(\begin{array}{*{20}{c}}{14}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{14}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{55}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{35}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{25}\end{array}\)

\[\begin{array}{*{20}{c}}4\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{16}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\]

\(\begin{array}{*{20}{c}}7\\\hline{16}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{28}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{39}\\\hline{62}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{52}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{34}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{64}\\\hline{75}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{48}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{64}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{51}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{68}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{34}\\\hline{35}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{16}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{32}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{62}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{45}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)