Give your little one the opportunity to dive deeper into addition with this add 6-digit and 5-digit numbers without regrouping worksheet. It is important for students to understand the basic relationship among digits in the numbers they are adding. When students add multi-digit numbers, they add digits at the same places to get the sum. Add 6-digit and 5-digit numbers without regrouping worksheet provides plenty 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.