place value idea By Colleen/2/WA

They would highlight 9. If the big number is on the top they do not need to borrow.

77
- 58

If the highlighted (big number) is on the bottom they must give the 7 a one and the neighbor must be borrowed from.

This works great for kids that just don't get the concept behing it. First teach the concept and then show this to the struggling kids. After they practice this a few time they have really got it!