This workbook contains 100 addition worksheets. Each worksheet has 20 to 35 problems. Exercises vary from 2-digit numbers added to 1-digit numbers to 4-digit numbers added to 4-digit numbers. Each worksheet has designated room at the top for students to write their names and for teachers or parents to record the score and time. All of the exercises are numbered for easy reference. All of the answers are tabulated in the back of the book, also with numbers so that teachers or parents can easily check the solutions. The problems are written with a size 14 font and the digits have a little space between them in order to provide room for students to write and line their numbers up with the problems. The copyright notice allows teachers and parents who purchase this book to reproduce selected worksheets for their own students and children.