This .zip file consists of two Smart Notebook presentations introducing and explaining addition with regrouping. I use it for third grade, but it would also be great for teaching second graders or reviewing with fourth graders.
Each lesson includes an explanation, guided practice, and independent practice. Challenge/algebraic questions are included in most lessons.
File 1- Addition patterns, introduction to regrouping, add whole numbers (2 or 3 digit), estimate sums
File 2- Add greater numbers, add more than two numbers, write a number sentence