Subtraction Strip Board (Premium Quality)

This set includes one hardwood board and natural wooden strips that correspond to the length of the squares 1 – 18, are used to indicate the number of subtract from one set of blue strips used to subtract with, and set of red strips for further exploration. All strips are stored in a wooden box. The child practices the sequence of subtraction combinations from 1 – 9 and begins the process of memorizing the concept of subtraction.