This is an interactive activity. It was designed in ActiveInspire for the Promethean Board, however I have included a pdf file as well in case you want to project it but don't have Promethean software or you want to print it out and use it with small group.
All students look at the example problem and say whether they need to regroup or not by using American Sign Language hand signals for R (regroup) or N (no regroup).
Work slowly through each problem practicing different strategies for adding larger numbers.
Then hand students complete the Ticket Out the Door to determine groups for the next day!