This worksheet strengthens students' accuracy and strategic flexibility while they add 5-digit and 4-digit numbers with regrouping. As students add multi-digit numbers, they often find the need to regroup numbers. They regroup 1 ten into 10 ones, 1 hundred into 10 tens, and so on. Help your students practice this concept and develop conceptual and strategic knowledge with add 5-digit and 4-digit numbers with regrouping worksheet. This worksheet is about practicing the column method in which numbers are written one on top of another. In this method, students use their place value understanding to solve the problems.