Montessori large number cards contain 4 sets of Large cards and 4 sets of Small Cards, representing different categories of numbers in the 'base ten' or decimal system, namely ones, tens, hundreds, and thousands.The primary purpose of the Number Cards is to help children recognize each category of the decimal system’s written numerical symbols. As they work with the material, they also discover how numbers are formed, and how we count beyond the number nine in a decimal category. Also, the activ