3-Digit Addition: Add Cross Then Down WorksheetsElevate your students’ math skills with our engaging "3-Digit Addition: Add Cross Then Down" worksheets! Perfect for 2nd, 3rd, and 4th-grade learners, this freebie provides a fun and interactive way to practice 3-digit addition. Designed with an easy-to-follow expanded form strategy, these worksheets help reinforce foundational math concepts while keeping students engaged. Grade Levels: 2nd Grade, 3rd Grade, 4th Grade Subject: Math Learning Objecti