This worksheet strengthens students' accuracy and strategic flexibility while they add and subtract 5-digit and 3-digit numbers with regrouping. The opposite operation to addition is subtraction and vice versa. In this worksheet, students apply this relationship and their knowledge of basic addition and subtraction facts to add and subtract 5-digit and 3-digit numbers with regrouping. 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.