Help your little one develop a knack for math with this add and subtract 4-digit and 2-digit numbers with regrouping worksheet. Students use the relationship between addition and subtraction to find the missing number in this worksheet. They also need to regroup numbers to get to the answer in add and subtract 4-digit and 2-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.