This presentation includes a full lesson on adding without regrouping, including single digits, double digits and multiples of 10. The lesson is presented in "I do, we do, you do" format using toy prices to introduce the concept. The lesson is followed by many practice slides, allowing the students to work on paper or whiteboards. Each slide pauses appropriately for you to check student work. Excellent introductory lesson for 1.NBT.4 - Adding one- and two- digit numbers.