900 Addition Math Problems Workbook to Boost your Kids Brain Power Perfect Gift for your kids to improve Math Skill This Book Contains: 30 Days Math Challenge Problems with solutions 30 Math problems per day - not so hard for your kids Full page solutions at the end of book Score tracking each day with the total score tracking page to see your kids improvement Premium matte cover design Perfectly Large si. 900 Addition Math Problems Workbook to Boost your Kids Brain Power Perfect Gift for your kids to improve Math Skill This Book Contains: 30 Days Math Challenge Problems with solutions 30 Math problems per day - not so hard for your kids Full page solutions at the end of book Score tracking each day with the total score tracking page to see your kids improvement Premium matte cover design Perfectly Large si