4th Grade Addition & Estimation Mastery Unit | Standards-Aligned | 150+ Pages | Worksheets, Tests & Exit Tickets ⭐Help your 4th graders build confidence, accuracy, and flexible thinking with this complete Addition & Estimation Unit! This resource is thoughtfully designed to support students from foundational strategies all the way to fluency and problem-solving, making it perfect for whole-group instruction, small groups, math centers, and intervention.This packet is fully aligned to 4t