eBook
Math Planet: Algebra 1: Properties of Equalities eBook
Math Planet

Math Planet: Algebra 1: Properties of Equalities

For Students 9th - 10th Standards
Provides examples and a video lesson that illustrates the properties of equalities.
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Activity
Help algebra.com: Addition Principle Activity
Help Algebra

Help algebra.com: Addition Principle

For Students 9th - 10th Standards
Beginning with a discussion of equivalent equation, this site describes the Addition Principle and how it is used to help solve algebraic equations.
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