1、Scenario: suitable for families, kindergartens, early childhood centers, nurseries, parent-child kindergartens and other early childhood institutions. Prepare for more abstract mathematical concepts and teaching aids operation, and cultivate children's logical thinking ability. 2、Used fo various decimal operations and with the decimal fraction board,this material introduces decimal quantity and symbol.The material consists of a wood box containing color-coded cubes to represent hierarchical values.Included is a complete set of decimal number cards 0.1-0.00009. The decimal fraction boards is used for the introduction of decimal number formation and for performing the operations of addition,subtraction and multiplication with decimal whole numbers.