It's a fact! 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 lessons are planned in learning sequence; skills introduced in one lesson build on those taught in previous lessons. It's a perfect way to introduce, review, and maintain essential math skills.