Children add three-digit numbers in columns. They add the digits in the ones place first, followed by the digits in the tens place, and finally the digits in the hundreds place. Problems progress from addition with no regrouping to addition with regrouping.

This PowerPoint lesson is a multi-click animation sequence that introduces standards-based math skills and concepts. Also includes three practice pages at levels A (below grade level), B (at grade level), and C (above grade level), which may be distributed according to students' abilities.