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Math problems with large numbers can be overwhelming. Through our step-by-step progression of activities, your child will easily master addition and subtraction with four-digit numbers. Our workbook builds on basic addition and subtraction skills to teach your child how to confidently compute addition and subtraction with large numbers. Topics Covered in this Book: Addition & subtraction review Four-digit vertical form addition Four-digit vertical form subtraction Regrouping (borrowing) Patterns & sequencing