1.2 Operation of Matrices

What is the condition of adding and subtracting 2 matrices?

• Two matrices can be added and substracted even they have different size.

• Two matrices can be added and subtracted if they have the same size.

Tags

CCSS.HSN.VM.C.8

The answer is

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Tags

CCSS.HSN.VM.C.8

The answer is

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Tags

CCSS.HSN.VM.C.8

Tick 2 types of multiplication of Matrices

• Scalar multiplication

• Two matrices in which the number of columns of the first matrix must be EQUAL to the number of rows of the second matrix.

• Two matrices in which the number of columns of the first matrix must not be EQUAL to the number of rows of the second matrix.

Tags

CCSS.HSN.VM.C.8

The answer is

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Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What will be the dimension of multiplying matrices A_2x3 and B_3x2?

• 2 x 3

• 3 x 3

• 3 x 2

• 2 x 2

Answer explanation

The dimension or order for the product of multiplication is 2 x 2.

Tags

CCSS.HSN.VM.C.8

The answer is

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Answer explanation

The answer is 7 and 12.

Tags

CCSS.HSN.VM.C.11

Which of the following is necessary for two matrices to be multiplied?

• The number of columns in the first matrix must equal the number of rows in the second matrix.

• The matrices must be square matrices.

• The matrices must have the same dimensions.

• The number of rows in the first matrix must equal the number of columns in the second matrix.

If matrix C is of order 4 x 5 and matrix D is of order 5 x 2, what is the order of the product CD?

• 4 x 2

• 5 x 5

• 5 x 2

• 2 x 4

Which operation is not defined for matrices of different sizes?

• Scalar multiplication

• Multiplication

• Addition

• Transposition