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Free Adding & Subtracting Complex Numbers Worksheet

Ten add-and-subtract-complex-numbers problems with a clean answer key.

Answer key included
Name: Date:
Adding & Subtracting Complex Numbers
1.
(−1−3i)+(−2−6i)(-1 - 3i) + (-2 - 6i)
2.
(−5+3i)−(−6−2i)(-5 + 3i) - (-6 - 2i)
3.
(6+6i)+(−5−5i)(6 + 6i) + (-5 - 5i)
4.
(4+3i)+(4+6i)(4 + 3i) + (4 + 6i)
5.
(1+2i)+(−1−i)(1 + 2i) + (-1 - i)
6.
(1−4i)+(−3−4i)(1 - 4i) + (-3 - 4i)
7.
(4+2i)+(1+5i)(4 + 2i) + (1 + 5i)
8.
(−5+3i)−(−2+6i)(-5 + 3i) - (-2 + 6i)
9.
(6+3i)+(1+i)(6 + 3i) + (1 + i)
10.
(−3−5i)+(−3+6i)(-3 - 5i) + (-3 + 6i)
Andy · alldayeverydaymath.com
Name: Answer KeyDate:
Adding & Subtracting Complex Numbers
1.
(−1−3i)+(−2−6i)(-1 - 3i) + (-2 - 6i)
Answer: −3−9i-3 - 9i
2.
(−5+3i)−(−6−2i)(-5 + 3i) - (-6 - 2i)
Answer: 1+5i1 + 5i
3.
(6+6i)+(−5−5i)(6 + 6i) + (-5 - 5i)
Answer: 1+i1 + i
4.
(4+3i)+(4+6i)(4 + 3i) + (4 + 6i)
Answer: 8+9i8 + 9i
5.
(1+2i)+(−1−i)(1 + 2i) + (-1 - i)
Answer: ii
6.
(1−4i)+(−3−4i)(1 - 4i) + (-3 - 4i)
Answer: −2−8i-2 - 8i
7.
(4+2i)+(1+5i)(4 + 2i) + (1 + 5i)
Answer: 5+7i5 + 7i
8.
(−5+3i)−(−2+6i)(-5 + 3i) - (-2 + 6i)
Answer: −3−3i-3 - 3i
9.
(6+3i)+(1+i)(6 + 3i) + (1 + i)
Answer: 7+4i7 + 4i
10.
(−3−5i)+(−3+6i)(-3 - 5i) + (-3 + 6i)
Answer: −6+i-6 + i
Andy · alldayeverydaymath.com

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About this worksheet

Students combine complex numbers by adding real parts to real and imaginary to imaginary. The first move in the complex-number unit, and a clean warm-up before multiplication.

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