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eBook: Mark Twain 404041-EB Pre-Algebra Practice Book, Grade 6 - 8 VariesBy:Default Ces enveloppes conviennent parfaitement auxMake algebra equations easy for students in grades 6 and up using Pre Algebra Practice! This 128 page book is geared toward students who struggle in pre algebra and covers the concepts of real numbers, integers, properties, operations, exponents, square roots, and patterns.