Addition Fluency Sheets (Kumon style), 1-12. 3 columns of 15 questions - 45 per page. Great for the practice of addition in progressive complexities. 50 sheets different sheets of increasing complexity, each different so no student gets the same one. Great to reinforce skills, introduce addition, independent work, or homework! Helps reinforce principles for struggling students. Fluency sheets promote the mastery of math skills at an individual pace. Its structured worksheets enhance discipline,