This Smartboard file is a lesson for Addition and Subtraction of Decimal practice. It begins with a warm-up activity which reviews rounding of both whole numbers and decimals. Next, the lesson gives practice with the use of models for both operations. The core part of the lesson is on slide 4 with practice on both sums and differences. There is an additional page for problem solving practice as well.
All answers can be revealed on each page by locating the rectangle labeled "slide to reveal answers."