Within 20 Math Decomposition Ruler Plastic Addition Ruler Subtraction Ruler School Supplies

Label:Yes Clear numbers and accurate decomposition. Arithmetic learning, educational toy, durable, smooth. In addition, your baby's thought can also be exercised greatly. Playing with your kids will make them happy. Analyze addition and subtraction to make it easy for children to learn. This plastic ruler is a teaching aid designed specially for the kid. It is a wonderful way to arouse your baby's interest of cognition of numbers.

Specifications: Material: Plastic Color: Pink, Blue Size: 24.5 * 6.4cm Usage: Slide the ruler to select numbers from the box, observe the numbers in the middle combination, and determine that the numbers in the box are the sum of the upper and lower numbers on the right.

Note: 1. Manual measurement, please allow 2cm error. 2. Due to the brightness of the light, there are slight differences between the image and the actual object.

Package Included: 1 * Math Decomposition Ruler