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When your child understands and develops key skills, math can be more fun and a lot less stressful. In Addition & Subtraction Grades 1-2 Deluxe Edition, you'll find hundreds of math facts for fast, fun learning, with clear instructions and step-by step examples for you and your child to follow. The workbook is aligned with the Common Core State Standards for Mathematics, a comprehensive and progressive set of learning objectives created to help students succeed in math. At the bottom of each workbook page is a cross-reference to the Common Core grade level and “domain” or skill area that the activity practices.