Free Printable Adding Subtracting Imaginary and Complex Numbers

1.

Another way to express $\sqrt[]{-1}$ is?

a)

1

b)

-1

c)

i

d)

0

2.

What does i²= ?

a)

1

b)

-1

c)

√-1

d)

√1

3.

How do you write a complex number?

a)

a-bi

b)

a+bi

c)

ai+b

d)

ai-b

4.

Add/Subtract using the proper rules:
(7 + 2i) - (-12 - 4i)

a)

-5 - 2i

b)

19 - 2i

c)

-5 + 6i

d)

19 + 6i

5.

Add/Subtract using the proper rules: (3 + 2i) + (7 - 12i)

a)

10+10i

b)

10-10i

c)

10+14i

d)

4-10i

6.

(5-2i) + (-7+8i)

a)

-2+6i

b)

12+6i

c)

-35-16i²

d)

-35 -16i

7.

Simplify:
(10+ 15i) - (48 - 30i)

a)

58 - 45i

b)

58 - 15i

c)

-38 - 15i

d)

-38 + 45i

8.

What is $\left(3-5i\right)+\left(-4+7i\right)$ ?

a)

$-1+2i$

b)

$7-12i$

c)

$1+2i$

d)

$-2+3i$

9.

subtract: $\ \left(-5+3i\right)-\left(4+7i\right)$

a)

$-1-4i$

b)

$-9-4i$

c)

$-1+4i$

d)

$-9+4i$

10.

Add $\left(1+i\right)+2+2i$

a)

$5+3i$

b)

$1+i$

c)

$3+3i$

d)

$5+2i$

11.

Add $\left(1+6i\right)+\left(5+7i\right)$

a)

$-6+i$

b)

$4+i$

c)

$6+i$

d)

$6+13i$

12.

Subtract $\left(-6+2i\right)-\left(7-i\right)$

a)

$-13-i$

b)

$-10+i$

c)

$-13+3i$

d)

$-7+i$

13.

Simplify.

a)

-5i

b)

5

c)

5i

d)

-5

14.

Simplify $\sqrt[]{-4}$

a)

2i

b)

-2i

c)

2

d)

4i

15.

Simplify $\sqrt[]{-81}$

a)

-√81

b)

-9i

c)

9i

d)

81i

Adding Subtracting Imaginary and Complex Numbers

Total questions: 15

Worksheet time: 11mins

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