Features: Brand new and high quality A versatile tool for math education! This 2-in-1 teaching aid features a sliding ruler and a breakdown of numbers, perfect for children learning addition and subtraction. Safe and durable, this plastic tool is designed with rounded edges and clear, non-chipping fonts. The thick material ensures it will withstand frequent use in the classroom or home. Great for teacher, parent, and students alike! Anyone improve their math skills from this handy tool. Use this tool in the classroom or home to teach math concepts in an engaging way. Its compact size makes it easy to store and transport. Perfect for visual learners, this tool provides a tactile way to understand math concepts. its 2 functionality allows for more efficient and effective teaching. Specifications: Material: Plastic Size: 25.5cm Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 2PC x Digital Decomposition Ruler