Cranmer Abacus - 2 (Simple Addition with 4/5 Exchanges)

This video covers steps for single and double digit addition with 4/5 exchanges. Both the counting method and indirect method are explained for each of the problems. By the way, you can get this abacus from APH (American Printing House for the Blind). If you are a TVI, you can get it on quota funds. If you are a parent, ask your TVI, hehe.