The Best Addition and Subtraction Practice Workbook This perfectly designed Addition and Subtraction Workbook can help any child master basic math exercises in no more than 100 days if he uses this beautiful and attractive workbook. Even a few minutes a day of practice is enough to help the student discover and perform in the wonderful world of mathematics. This math practice workbook is organized in a progressive skill-building way for kids to develop confidence in addition & subtraction for digits 0-20. The workbook is created in the perfect size of 8.5 x 11 in (21.59 x 27.94 cm). The answer key is included in the back of this book, so students can check their answers easily. About this workbook: ¿ Specially designed for children between 5 and 8 years old ¿ Perfect size: 8.5 x 11 in (21.59 x 27.94 cm) ¿ Printed on high-quality paper ¿ 117 Pages ¿ Amazing Premium Soft Glossy Cover