Bài tập Toán lớp 4 Tính giá trị biểu thức với phân số có đáp án

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Tính giá trị biểu thức (1/2 + 1/3) x 3/4 =

4/4

Tính giá trị biểu thức (1/2 + 1/3) x 3/4 = (ảnh 1)

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0/3000 ký tự

Giải thích

\[\left( {\begin{array}{{20}{c}}1\\\hline2\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline3\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}3\\\hline4\end{array}{\rm{ = }}\begin{array}{{20}{c}}5\\\hline8\end{array}\]	\[\left( {\begin{array}{{20}{c}}3\\\hline5\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline4\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}2\\\hline3\end{array}{\rm{ = }}\begin{array}{{20}{c}}7\\\hline{30}\end{array}\]
\[\left( {\begin{array}{{20}{c}}4\\\hline7\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline3\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ = }}\begin{array}{{20}{c}}2\\\hline{21}\end{array}\]	\[\left( {\begin{array}{{20}{c}}3\\\hline8\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline6\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}2\\\hline3\end{array}{\rm{ = }}\begin{array}{{20}{c}}{13}\\\hline{16}\end{array}\]
\[\left( {\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline3\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}4\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}{77}\\\hline{60}\end{array}\]	\[\left( {\begin{array}{{20}{c}}3\\\hline{10}\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline8\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}7\\\hline{48}\end{array}\]
\[\left( {\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}2\\\hline5\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}3\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}{13}\\\hline{70}\end{array}\]	\[\left( {\begin{array}{{20}{c}}3\\\hline7\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline4\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}{57}\\\hline{70}\end{array}\]
\[\left( {\begin{array}{{20}{c}}5\\\hline8\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}2\\\hline3\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}4\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}{217}\\\hline{96}\end{array}\]	\[\left( {\begin{array}{{20}{c}}2\\\hline7\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline5\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline4\end{array}{\rm{ = }}\begin{array}{{20}{c}}{68}\\\hline{105}\end{array}\]
\[\left( {\begin{array}{{20}{c}}3\\\hline8\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline{12}\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ = }}\begin{array}{{20}{c}}{55}\\\hline{48}\end{array}\]	\[\left( {\begin{array}{{20}{c}}4\\\hline9\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline{10}\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}{31}\\\hline{108}\end{array}\]
\[\left( {\begin{array}{{20}{c}}3\\\hline{10}\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline{12}\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}5\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}{13}\\\hline{84}\end{array}\]	\[\left( {\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline6\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}4\\\hline9\end{array}{\rm{ = }}\begin{array}{{20}{c}}{51}\\\hline{40}\end{array}\]
\[\left( {\begin{array}{{20}{c}}3\\\hline5\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline3\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}4\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}7\\\hline{15}\end{array}\]	\[\left( {\begin{array}{{20}{c}}2\\\hline9\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline3\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}{25}\\\hline{54}\end{array}\]
\[\left( {\begin{array}{{20}{c}}2\\\hline7\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline5\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline8\end{array}{\rm{ = }}\begin{array}{{20}{c}}8\\\hline{35}\end{array}\]	\[\left( {\begin{array}{{20}{c}}3\\\hline{10}\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline5\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}2\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}1\\\hline7\end{array}\]
\[\left( {\begin{array}{{20}{c}}3\\\hline8\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline{10}\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}4\\\hline5\end{array}{\rm{ = }}\begin{array}{{20}{c}}{11}\\\hline{32}\end{array}\]	\[\left( {\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline8\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}3\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}9\\\hline{40}\end{array}\]
\[\left( {\begin{array}{{20}{c}}1\\\hline3\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline5\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}7\\\hline8\end{array}{\rm{ = }}\begin{array}{{20}{c}}7\\\hline{15}\end{array}\]	\[\left( {\begin{array}{{20}{c}}5\\\hline9\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}2\\\hline7\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline5\end{array}{\rm{ = }}\begin{array}{{20}{c}}{85}\\\hline{189}\end{array}\]
\[\left( {\begin{array}{{20}{c}}2\\\hline9\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline8\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}5\\\hline7\end{array}{\rm{ = }}\begin{array}{{20}{c}}{49}\\\hline{360}\end{array}\]	\[\left( {\begin{array}{{20}{c}}4\\\hline5\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline6\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}3\\\hline{10}\end{array}{\rm{ = }}\begin{array}{{20}{c}}{29}\\\hline{100}\end{array}\]
\[\left( {\begin{array}{{20}{c}}5\\\hline{12}\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline8\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline4\end{array}{\rm{ = }}\begin{array}{{20}{c}}7\\\hline{18}\end{array}\]	\[\left( {\begin{array}{{20}{c}}4\\\hline{11}\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline6\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline5\end{array}{\rm{ = }}\begin{array}{{20}{c}}{65}\\\hline{198}\end{array}\]
\[\left( {\begin{array}{{20}{c}}2\\\hline7\end{array}{\rm{ }} + {\rm{ }}\begin{array}{{20}{c}}1\\\hline9\end{array}} \right){\rm{ }} \times {\rm{ }}\begin{array}{{20}{c}}5\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}{125}\\\hline{378}\end{array}\]	\[\left( {\begin{array}{{20}{c}}2\\\hline5\end{array}{\rm{ }} - {\rm{ }}\begin{array}{{20}{c}}1\\\hline4\end{array}} \right){\rm{ }}:{\rm{ }}\begin{array}{{20}{c}}3\\\hline6\end{array}{\rm{ = }}\begin{array}{{20}{c}}3\\\hline{10}\end{array}\]