These erasable paper math number line cards feature precisely scales and markings to help students visually grasp number line concepts, perfect for classroom instruction and home tutoring. Made from recyclable paper that ensures durability while addressing parents' concerns, suitable for students of all ages in daily learning activities. The compact and light weight addition and subtraction exercises cards are easy to carry, making it ideal for teachers and students for math practice. Beyond number line teaching, these addition and subtraction demonstration cards can demonstrate other math concepts like coordinate systems and function graphs, offering educators flexible teaching aid to sparks students' interest in mathematics. Package includes: 20Pieces Math Number Line Cards