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Pre-Algebra learning wrap-ups are a great way to review the following basic algebraic concepts: addition and subtraction of positive and negative numbers; multiplication and division of positive and negative numbers; solving for the unknown (working with variables); understanding algebraic expressions; mental math; prime factors; perfect squares; square roots; formulas for area, perimeter and volume. Included in this box: 5 sets of wrap-ups complete with 10 boards per set. String Easy instructions 600 problems and answers in all
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