Children practice adding and subtracting 5-digit and 4-digit numbers with regrouping with this worksheet. Subtraction is the inverse of addition and vice versa. Students apply this relationship to solve a set of problems in add and subtract 5-digit and 4-digit numbers with regrouping worksheet. As the worksheet uses a horizontal format, it allows for more creativity when it comes to how the student solves the problem. In contrast, in the vertical format, students usually employ the standard method to solve.