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Matrix Addition

Tool to calculate matrix additions in computer algebra. The sum of N matrices is generally obtained by summing the elements of each matrix.

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Matrix Addition -

Tag(s) : Matrix

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Matrix Addition

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Addition of 2 Matrices



Addition of 3 Matrices


Tool to calculate matrix additions in computer algebra. The sum of N matrices is generally obtained by summing the elements of each matrix.

Answers to Questions

How to add 2 matrices?

The addition of matrices can only be done with 2 matrices of the same shape (size).

If \( M_1=[a_{ij}] \) is a matrix of \( m \) lines and \( n \) columns (with \( m \) and \( n \) identical in the case of a square matrix) and \( M_2=[b_{ij}] \) a matrix also of \( m \) lines and \( n \) columns.

The sum of these 2 matrices \( M_1 + M_2 = [c_{ij}] \) is a matric of the same size, ie. \( m \) lines and \( n \) columns, with : $$ \forall i, j : c_{ij} = a_{ij}+b_{ij} $$

Example: $$ \begin{bmatrix} 1 & 2 \\ 3 & 4 \\ 5 & 6 \end{bmatrix} + \begin{bmatrix} 7 & 8 \\ 9 & 10 \\ 11 & 12 \end{bmatrix} = \begin{bmatrix} 1+7 & 2+8 \\ 3+9 & 4+10 \\ 5+11 & 6+12 \end{bmatrix} = \begin{bmatrix} 8 & 10 \\ 12 & 14 \\ 16 & 18 \end{bmatrix} $$

How to add 2 matrices in Excel?

Add the elements to the identical coordinates in each matrix.

How to add 2 matrices of distinct sizes?

The addition operation (or sum) for matrices can only be done with same size matrices. Nevertheless, there is the direct sum operation, which can be used with distinct size matrices.

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