WorksheetsMatrices Practice
Total questions: 14
Worksheet time: 14mins
Name
Class
Date
1.
What is the entry at r31?
a)
3
b)
1
c)
4
d)
7
2.
What is the address of 8?
a)
R23
b)
R32
c)
r23
d)
r32
3.
What must be true in order to ADD two matrices?
a)
They must be square.
b)
The dimensions must be the same.
c)
The determinant can't equal 0.
d)
The column of the 1st must equal the row of the 2nd.
4.
Add
a)
11 8
-4 2
-4 2
b)
3 2
-6 -6
-6 -6
c)
-3 2
-4 -6
-4 -6
d)
10 8
-6 2
-6 2
5.
Subtract
a)
3 -8
0 -1
0 -1
b)
3 -4
8 -13
8 -13
c)
-3 8
0 1
0 1
d)
3 -8
-8 1
-8 1
6.
Find A+B
a)
8 10
8 1
8 1
b)
12 25
7 1
7 1
c)
10 30
0 1
0 1
d)
can't add two together because the rows dont match columns
7.
What are the dimensions of this matrix?
a)
2 x 3
b)
3 x 2
c)
6 x 1
d)
1 x 6
8.
Multiply by the scalar
a)
20 15 -10
30 -5 0
b)
-20 15 -10
30 -5 0
c)
1 8 3
11 4 5
d)
20 -15 10
-30 5 0
9.
Name the dimensions (hint: think of rows then columns)
a)
6x2
b)
2x6
c)
3x2
d)
2x3
10.
Dimensions?
a)
a
b)
b
c)
c
d)
d
11.
Is this possible?
a)
Yes
b)
No
12.
Which entry is in a23?
a)
a
b)
b
c)
c
d)
d
13.
What is the entry address for 7?
a)
R31
b)
r31
c)
r13
d)
R13
14.
Is this possible?
a)
Yes
b)
No
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