This add two 3-digit numbers with regrouping worksheet consists of a set of questions on addition, which help students develop fluency. It is common for students to regroup numbers when they add multi-digit numbers. They understand that one hundred is ten tens, one ten is ten ones, and so forth. Use add two 3-digit numbers with regrouping worksheet to help your students practice this concept and develop their conceptual and strategic knowledge. 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.