'First matrix' presentation slideshows

Unit 3: Matrices

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Chapter 4

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Lesson 12.2

Lesson 12.2. Matrix Multiplication. Row and Column Order. The rows in a matrix are usually indexed 1 to m from top to bottom. The columns are usually indexed 1 to n from left to right. Elements are indexed by row, then column. Scalar Multiplication of Matrices.

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Matrix Algebra

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Add, Subtract, and Multiply Matrices

Add, Subtract, and Multiply Matrices. Matrix. A. A matrix M is an array of cell entries ( m row,column ) that have rectangular dimensions ( Rows x Columns ). Example:. a row,column. 4. 3. A. 15 x. 3x4. Dimensions:. Scalar Multiplication.

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Multiplying Matrices

Multiplying Matrices. When multiplying Matrices the columns in the first matrix must match the rows in the second matrix (ORDER IS IMPORTANT!) Multiplication of Matrices is NOT COMMUTATIVE! A 3X5 can multiply with a 5x2 but a 5X2 CANNOT multiply with a 3X5. Multiplying Matrices Steps.

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