Khan Academy Static

Learn about identity matrices and about how matrix multiplication relates to real number multiplication (spoiler: the distributive property applies but the commutative property does not!).

4866_Is_matrix_multiplication_commutative_.html

4864_Intro_to_identity_matrix.html

4865_Dimensions_of_identity_matrix.html

4868_Zero_matrix_matrix_multiplication.html

4870_Using_identity_zero_matrices.html

4867_Associative_property_of_matrix_multiplication.html

4863_Defined_matrix_operations.html

4869_Using_properties_of_matrix_operations.html