This resource provides a comprehensive collection of exercises and challenges focusing on understanding and manipulating numbers in various forms, particularly base-ten notation, expanded form, and standard form. It includes multiple-choice questions, fill-in-the-blank activities, and modeling tasks designed to help students develop a strong foundation in place value concepts. Tasks require students to build models using base-ten blocks, convert numbers between expanded and standard forms, and match different numerical representations. The activities are aimed at enhancing numerical reasoning and comprehension of number representation in a structured, engaging manner.