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WorksheetsAdding, Subtracting, Multiplying Complex Numbers
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
Another way to express √-1 is?
a)
1
b)
-1
c)
i
d)
0
2.
The complex conjugate of 4 + 3i is
a)
3 + 4i
b)
3 - 4i
c)
4 - 3i
d)
4 + 3i
3.
The complex conjugate can be found by...
a)
Changing the sign of both a and b
b)
Changing the sign of a
c)
Changing the sign of b
d)
Switching the a and b values
4.
(5-2i) + (-7+8i)
a)
-2+6i
b)
12+6i
c)
-35-16i2
d)
-35 -16i
5.
a)
A
b)
B
c)
C
d)
D
6.
a)
A
b)
B
c)
C
d)
D
7.
a)
A
b)
B
c)
C
d)
D
8.
a)
A
b)
B
c)
C
d)
D
9.
Choose the correct answer for the operation pictured.
a)
7-13i
b)
7-i
c)
1-13i
d)
1-i
10.
a)
A
b)
B
c)
C
d)
D
11.
Find the sum.
(5-2i) + (-7+8i)
a)
-2+6i
b)
12+6i
c)
-35-16i2
d)
-35 -16i
12.
(1-3i)(2+5i)
a)
22-i
b)
16-i
c)
17-i
13.
(3+8i)(-2-i)
a)
2-19i
b)
23-i
c)
34+5i
d)
23-i
14.
Simplify:
(10+ 15i) - (48 - 30i)
a)
58 - 45i
b)
58 - 15i
c)
-38 - 15i
d)
-38 + 45i
15.
3i + 2i
a)
5i
b)
5i2
c)
6i
d)
-5
16.
(2i)(3i)
a)
5i
b)
-5
c)
6i
d)
-6
17.
(-3-i)(6-i)
a)
-21-7i
b)
-19-3i
c)
-15-5i
d)
-17-9i
18.
Simplify
(12 - 4i) + (-2 + 8i)
a)
8 + 104i
b)
10 + 4i
c)
14 - 4i
d)
10 - 12i
19.
(5-i)(5-i)
a)
15-8i
b)
36
c)
24+10i
d)
24-10i
20.
(-7 + 9i) + (2 - 10i)
a)
-5 + i
b)
-5 - i
c)
-9 + 1
d)
9 - i
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