This 18-slide PowerPoint presentation demonstrates the processes of addition & subtraction involving decimal numbers. The content is based on Common Core standard: CCSS.Math.Content.6.NS.B.3. Decimal addition & subtraction is compared to whole number addition & subtraction to see the similarities. Careful attention is given to place value, lining up numbers correctly, and filling in empty areas with zeroes. Sample problems are provided and worked out. You can use this presentation as a lesson for full class or individual student use. Use of the presentation should take up between 20 to 30 minutes of class time based upon stoppage for emphasis and student participation. Place this PowerPoint on your teacher website as a reference tool. For similar products, visit my store at https://www.teacherspayteachers.com/store/David-Purnell.