DOUBLES . Doubles is a key strategy that helps students build strong number sense and develop fluency with addition and subtraction. Doubles facts (like 4 4 or 7 7) provide an efficient way for students to solve problems quickly and accurately, and they form the foundation for related strategies such as near doubles (e.g. 6 7). . When students are confident with their doubles, they can draw on these known facts to solve more complex problems, reason mathematically, and work flexibly with numbers

2nd Grade Math 3.1, Use Doubles Facts to Add