You will need SMART Notebook software to use this file. This 37 slide SMART presentation presents how to add and subtract 2 digit numbers without teaching the traditional algorythm for regrouping. Students will learn how to: use a hundreds chart to add and subtract 2 digit numbers, use base-ten blocks to add and subtract 2 digit numbers and how to use expanded notation to add and subtract 2 digit numbers. Smart presentation includes math talk discussion questions, interactive activities, and