Curated and Reviewed by
Lesson Planet
Sal uses numeric expansion to show the process of subtracting four-digit numbers. For example, he expands the number 6004 and writes it as 6000+0+0+4 and 2678 as 2000+600+70+8. When he regroups, viewers will be able to see the actual number exchange that occurs when borrowing from a neighboring number. He follows up with several practice problems.
10 Views
3 Downloads
Additional Tags
Resource Details
Creative Commons
BY-NC-SA: 3.0