Features: This comprehensive math workbook combines addition and subtraction mathematical operations, covering addition and subtraction within 10/20/50/100 through systematically graded exercises to build calculation skills progressively. Crafted from paper, strong adhesive bound, 78 pages double side printed, with colored art illustrations, it offer layered difficulty levels for adaptable learning. Suitable for preschooler, children 4-8 years old, and students seeks foundational math reinforcement and parent/teacher requires structured teaching aid for mathematical calculation mastery. Widely used for classroom warmming up, homework assignments, or travel learning during commutes and family trip due to its portable size. The math addition and subtraction exercises workbook enhancing independent study efficiency and problem solving ability, making progress tracking effortless with organized 10 to 100 number ranges. Specifications: Component: Paper Color: As Picture Shown Size: Approx. 185x260mm/7.28x10.24in Weight: Approx. 180g Suitable for reading age: suitable for Pages: 78 Package Includes: 1Piece Math Addition Subtraction Workbook note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color