Add and Subtract Two 6-Digit Numbers with Regrouping: Horizontal Addition and Subtraction Worksheet

This worksheet strengthens students' accuracy and strategic flexibility while they add and subtract two 6-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 two 6-digit numbers with regrouping.