Free Printable Multiplying Matrices

Free Printable Worksheets

Worksheets

Multiplying Matrices

Total questions: 19

Worksheet time: 19mins

Name

Class

Date

1.

a)

b)

c)

d)

2.

AFTER multiplying by the scalar, what will this element be?

a₃₂

(a)

3.

a)

undefined

b)

c)

d)

4.

a)

Row 1 : 18, -12, -6
Row 2 : -42, -48, 30
Row 3 : -24, -36, 54

b)

Row 1 : 6, 18, 12
Row 2 : 30, 42, 48
Row 3 : 54, 36, 24

c)

Row 1 : 18, 12, 6
Row 2 : 42, 48, 30
Row 3 : 24, 36, 54

d)

Row 1 : -18, 12, 6
Row 2 : 42, 48, -30
Row 3 : 24, 36, -54

5.

Find -3A

a)

b)

c)

d)

Does Not Exist

6.

a)

b)

c)

d)

7.

Bonus Point! 3A=?

a)

b)

c)

d)

8.

Perform the indicated matrix operation.

a)

b)

c)

d)

Not possible.

9.

If N = [[-3, 3], [-2, 2]] and t = -1, what is the result of tN?

a)

[[3, -3], [2, -2]]

b)

[[-3, 3], [-2, 2]]

c)

[[1, -1], [1, -1]]

d)

[[0, 0], [0, 0]]

10.

How do you multiply a scalar into a matrix?

a)

Multiply all of the entries by the scalar

b)

Replace every entry with the scalar

c)

Add the square of it to all of the entries

d)

Multiply the first row by the scalar

11.

a)

A

b)

B

c)

C

d)

D

e)

E

12.

a)

b)

c)

d)

e)

It is not possible.

13.

a)

A

b)

B

c)

C

d)

D

14.

Hint; which of the following multiplications is possible?

a)

$C^2$

b)

AB

c)

BA

d)

BC

e)

$A^2$

15.

a)

A

b)

B

c)

C

d)

D

e)

E

16.

Given matrices A & B: A is a (4 X 5) matrix B is a (5 X 1) matrix What are the dimensions of the product of A times B?

a)

4x1

b)

4x33

c)

33x1

d)

Matrix does not exist

17.

a)

A

b)

B

c)

C

d)

D

18.

What are the dimensions of this matrix?

a)

2 x 3

b)

3 x 2

c)

6 x 1

d)

1 x 6

19.

Multiply

a)

1 2
6 -8

b)

-3 -5
-5 -11

c)

-2 8
-6 -12

d)

2 -3
5 -2

100 %

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