Help your child master basic math with this Addition and Subtraction workbook from the I Know It! series. The lessons in this Math Grade 1 to Math Grade 2 workbook focus on practicing addition and subtraction facts and adding and subtracting with two-digit numbers (tens and ones). A range of activities from "Break the Code" math puzzles for kids with companion riddle, to more standard equations, help lock in learning. Bold, colorful illustrations help make it fun. This kind of enjoyable reinforcement learning is perfect as both a school aid, or as a great addition to 1st grade or 2nd grade kids homeschool teaching. Concepts and skills are identified at the bottom of each page to ensure children get variety. The slim 32-page size is handy for packing into totes, backpacks and luggage. With a little help from you, your child will enjoy hours of learning fun.