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 8 1/2 x 11 inches. paperback. 96 pages. full color.