Size: 25cm / 9.75" Color: Blue, Pink 1. Math learning tool: The number decomposition ruler can help children better understand numbers and improve math learning efficiency. 2. Number decomposition ruler: Using a number decomposition design, making math operations more intuitive and simple, helping children quickly master math skills. 3. Double-sided design: The double-sided number decomposition ruler provides more learning methods and possibilities, allowing children to excel in math training. 4. Math training tool: The number decomposition ruler is a tool for math training, helping children quickly improve their computational ability and logical thinking. 5. Parent-child interaction: The number decomposition ruler is not only suitable for children to use but can also be an interesting tool for parents and children to interact, making math learning more fun and effective. Package includes: 1*Ruler