📢 Opening Event Special!This worksheet is available as a free download through June 30, 2026. 📢 This worksheet is Part 1 of Adding two 2-digit numbers (with regrouping once).You can find Part 2 here.Topic Covered in This WorksheetThis worksheet focuses on adding two 2-digit numbers (with regrouping once), and the practice continues in Part 2. Students learn that when adding two 2-digit numbers, regrouping can happen in the ones place or the tens place: regroup 10 ones as 1 ten, or regroup 1