Phép nhân phân số 4/5 x 1/3 =

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ = }}\begin{array}{*{20}{c}}4\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}2\\\hline{77}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{66}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{52}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{20}\\\hline{77}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{65}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{54}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ = }}\begin{array}{*{20}{c}}2\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{20}\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{42}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}2\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{25}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ = }}\begin{array}{*{20}{c}}1\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{88}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}8\\\hline{117}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}1\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{39}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{12}\\\hline{91}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{108}\end{array}\)

\[\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline{63}\end{array}\]

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}8\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}8\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline3\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{10}\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{13}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline5\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{24}\\\hline{13}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline3\end{array}{\rm{ = }}\begin{array}{*{20}{c}}8\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{14}\\\hline9\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{28}\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline5\end{array}{\rm{ = }}\begin{array}{*{20}{c}}7\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}9\\\hline{14}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline4\end{array}{\rm{ = }}\begin{array}{*{20}{c}}2\\\hline3\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{16}\\\hline{35}\end{array}\)

\[\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{17}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}3\\\hline{17}\end{array}\]

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{21}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}1\\\hline{30}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{36}\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}8\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{35}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}4\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline8\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}{18}\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{ = }}\begin{array}{*{20}{c}}5\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{32}\\\hline{21}\end{array}{\rm{ = }}\begin{array}{*{20}{c}}4\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{81}\\\hline8\end{array}{\rm{ = }}\begin{array}{*{20}{c}}9\\\hline2\end{array}\)