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 Solving Systems of Linear Equations Using the Addition or Subtraction Method This learning object from Wisc-Online covers solving systems of linear equations using the addition or subtraction method. The unit looks at the common solution to simultaneous linear equations (also referred to as "system of linear equations"). Practice questions are also included. https://www.wisc-online.com/learn/formal-science/mathematics...
 Simplifying Algebraic Expressions: Addition and Subtraction This learning object from Wisc-Online covers simplifying algebraic expressions using addition and subtraction. The unit's activities include defining the terminology associated with algebraic expressions, using the fundamental laws of algebra in simplifying those expressions, and removing the symbols of grouping and changing the signs of appropriate terms. Practice questions are also included. https://www.wisc-online.com/learn/general-education/general-...
 Fundamental Laws of Algebra This learning object from Wisc-Online covers the fundamental laws of algebra. The interactive activity includes slides which cover the following topics: the commutative, associative and distributive laws as applied to addition and multiplication. https://www.wisc-online.com/learn/formal-science/mathematics...
 Abacus: The Art of Calculating with Beads The abacus has been around for several thousand years, and it is an efficient and interesting counting machine. The standard abacus can be used to perform addition, subtraction, division, and multiplication, along with its use in extracting square roots and cubic roots. This site was created by Luis Fernandes, and it explores the wide world of the abacus through illustrations, thoughtful essays,... http://www.ee.ryerson.ca/~elf/abacus/
 Super Computation: An AHA Moment In this interactive activity from Wisc-Online, the mathemagician will "magically" add numbers written on a virtual chalkboard. Students are challenged to figure out the mathematical "trick" that is being used in the activity, which is explained at the end of the exercise. https://www.wisc-online.com/learn/general-education/general-...
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