Help your little one develop a knack for math with this add two 4-digit numbers without regrouping worksheet. Students should be aware of the fundamental relationships between the digits in the numbers they add. They add digits at the same locations to find the sum while adding multi-digit numbers. Add two 4-digit numbers without regrouping worksheet offers a tonne of practice with this concept. 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.