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\left(\begin{matrix}2&3\\5&4\end{matrix}\right)+\left(\begin{matrix}2&0\\-1&1\end{matrix}\right)
You can add or subtract two matrices only if both matrices have the same number of rows and columns.
\left(\begin{matrix}2+2&3\\5-1&4+1\end{matrix}\right)
To add two matrices, add the corresponding elements.
\left(\begin{matrix}4&3\\5-1&4+1\end{matrix}\right)
Add 2 to 2.
\left(\begin{matrix}4&3\\4&4+1\end{matrix}\right)
Add 5 to -1.
\left(\begin{matrix}4&3\\4&5\end{matrix}\right)
Add 4 to 1.