Learn a novel approach to elementary arithmetic using open numbers, focusing on addition and cascading. Explore how this logical and systematic method enhances understanding of arithmetic operations, simplifies complex calculations, and connects naturally to money-related math. Discover the advantages of open numbers, practice addition with various examples, and master the two-step process for adding lists of open numbers. Delve into the concept of cascading and its role in interleaving addition outcomes. This educational video provides a fresh perspective on fundamental math skills, suitable for both students and educators looking to improve arithmetic proficiency.