Adding and Subtracting Matrices

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

Tags

CCSS.HSN.VM.C.8

Subtract

• 3    -8
  0   -1

• 3   -4
  8  -13

• -3   8
  0    1

• 3   -8
  -8    1

Tags

CCSS.HSN.VM.C.8

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

Subtract

• -5
  -8
  3
  10

• -9
  8
  3
  2

• 5
  -8
  3
  10

• -5
  8
  3
  2

Tags

CCSS.HSN.VM.C.8

In Matrix R (pictured) what element is in the second row, third column?

• 8

• 9.01

• 6

• 1

What must be true in order to ADD two matrices?

• They must be square.

• The dimensions must be equal.

• The determinant can't equal 0.

• The column of the 1st must equal the row of the 2nd.

Tags

CCSS.HSN.VM.C.8

Can you add these two matrices?

• Yes

• No

Tags

CCSS.HSN.VM.C.8

How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

Match each matrix to its correct dimension.

• 4 x 2

• 
• 3 x 1

• 
• 2 x 3

• 
• 1 x 3

• 
• 2 x 4

• 

Value of element a₂₃

• -2

• -1

• 7

• 15