phép nhân phân số: 72/77 x 11/12 =

\(\begin{array}{*{20}{c}}{72}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}6\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{16}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{64}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{18}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{35}\\\hline{74}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{37}\\\hline{42}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{32}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{17}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{52}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{18}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{36}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{57}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{21}\\\hline{44}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{55}\\\hline{24}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{35}\\\hline{32}\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{20}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{29}\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{22}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{34}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{31}\\\hline{76}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{62}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{52}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{37}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{65}\\\hline{74}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{36}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{18}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{23}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline3\end{array}\)

\(\begin{array}{*{20}{c}}{14}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{77}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{45}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{33}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{96}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{36}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{68}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{30}\\\hline{76}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{21}\\\hline{46}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{46}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{23}\end{array}\)

\(\begin{array}{*{20}{c}}{51}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{85}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{46}\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{23}\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\[\begin{array}{*{20}{c}}{50}\\\hline{63}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline7\end{array}\]

\(\begin{array}{*{20}{c}}{88}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{32}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{65}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{102}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{30}\end{array}\)

\(\begin{array}{*{20}{c}}{37}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{74}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{41}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{82}\\\hline{91}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{45}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{29}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{81}\\\hline{94}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{47}\\\hline{54}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{40}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{10}\\\hline{49}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{28}\end{array}\)

\(\begin{array}{*{20}{c}}{76}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{38}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{33}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}{62}\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{46}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{31}\\\hline{69}\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{81}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}{77}\\\hline{86}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{43}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{41}\\\hline{88}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{44}\\\hline{82}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\[\begin{array}{*{20}{c}}{61}\\\hline{72}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{51}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{61}\\\hline{153}\end{array}\]

\(\begin{array}{*{20}{c}}{28}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{42}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\[\begin{array}{*{20}{c}}{31}\\\hline{38}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{93}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\]

\(\begin{array}{*{20}{c}}{40}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{34}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{25}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{84}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{42}\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{17}\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{77}\\\hline{81}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{44}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{62}\\\hline{95}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{31}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}{85}\\\hline{98}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{49}\\\hline{51}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline6\end{array}\)

\[\begin{array}{*{20}{c}}{29}\\\hline{36}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\]

\(\begin{array}{*{20}{c}}{22}\\\hline{65}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{99}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{63}\\\hline{76}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)