Tens and Ones: https://www.youtube.com/watch?v=xJlgQJZg5Po&feature=youtu.be
Make a Ten (Check with Tens Above/Tens Below): https://www.youtube.com/watch?v=7A1LskR1J34&feature=youtu.be
Expanded Method: https://www.youtube.com/watch?v=eFn3CoVvdYc&feature=youtu.be
Building Method:
Make a Ten (Check with Tens Above/Tens Below): https://www.youtube.com/watch?v=7A1LskR1J34&feature=youtu.be
Expanded Method: https://www.youtube.com/watch?v=eFn3CoVvdYc&feature=youtu.be
Building Method: