Introduction to Complex Numbers

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Examples, videos, worksheets, solutions, and activities to help Grade 9 students learn what are complex numbers.

The following diagram shows that a complex number consists of a real part and an imaginary part. Scroll down the page for more examples and solutions.
Complex Plane

Complex Number Worksheets

What is a Complex Number?

Introduction to Complex Numbers
Complex Numbers: what they are, how to add and multiply them. Geometrical interpretation of multiplication.

Introduction to imaginary and complex numbers

Introduction to complex numbers

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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