This section introduces imaginary and complex numbers in the context of solutions to quadratic equations that don't have real-number solutions.
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Learn how to solve one-step addition and subtraction equations that have fractions and decimals in them. [4:32]
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Learn how to solve equations in one step by multiplying or dividing a number from both sides. These problems involve decimals and fractions. [7:51]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
This section draws on the different laws of exponents that have been covered in previous sections and uses them to simplify exponential expressions. Additionally, the lesson explores the impact on the simplified expression when the laws of exponents are applied in different orders.
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This game helps you practice adding tens. You will get to see a percent score of the answers you have correct, as well as running totals of the answers you have correct and incorrect.
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct answers.
Use this online game to practice adding three single digit numbers. The game gives running totals of your correct and incorrect answers, as well as a percent score of your correct answers.
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and incorrect answers.
Use this online game to practice your addition facts through 10+10. The game keeps track of how many answers you have correct and incorrect. It even gives you a percent score of your correct answers.
Learn the definitions and study examples of the four properties of addition. Then try the game to check your understanding of each of the properties. The game will tell you when your answers are correct. If you answer incorrectly, it will give you the correct answer.
This task examines the ways in which the plane can be covered by regular polygons in a very strict arrangement called a regular tessellation. These tessellations are studied here using algebra, which enters the picture via the formula for the measure of the interior angles of a regular polygon (which should therefore be introduced or reviewed before beginning the task). The goal of the task is to use algebra in order to understand which tessellations of the plane with regular polygons are possible.
This task provides a simple but interesting and realistic context in which students are led to set up a rational equation (and a rational inequality) in one variable, and then solve that equation/inequality for an unknown variable.
A work in progress, CK-12's Algebra I Second Edition is a clear presentation of algebra for the high school student. Topics include: Equations and Functions, Real Numbers, Equations of Lines, Solving Systems of Equations and Quadratic Equations.
Provides an explanation, examples, and a video lesson all related to the radical equations. [3:02]
In this lesson students learn how to solve equations involving absolute value. Students can explore guided notes and then attempt practice problems.
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In this lesson students write and solve linear equations to model real-world scenarios. Students watch a video tutorial, explore guided notes and attempt practice problems.
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In this lesson, students learn to write and solve equations to model real-world situations. Students watch a video tutorial, explore guided notes and attempt practice problems.
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CK-12 Foundation's Basic Algebra FlexBook is an introduction to the algebraic topics of functions, equations, and graphs for middle-school and high-school students.
This lesson covers solving expressions or equations for a given value. Students watch a video tutorial, explore guided notes and attempt practice problems.
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In this lesson students verify that solutions to algebraic equations are correct. Students watch a video tutorial, explore guided notes and attempt practice problems.
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