Cranmer Abacus Using rules 1-5 to add quickly – YouTube
https://www.youtube.com/watch?v=QGGqCH7fZJc
abacus
Cranmer Abacus–learn the rules to subtract by 1 – YouTube
https://www.youtube.com/watch?v=0oqlpGOSSMc
Cranmer Abacus–learn the rules to subtract by 2 – YouTube
https://www.youtube.com/watch?v=DVrUVEDZRi4
Cranmer Abacus for Math-introduction and begin adding – YouTube
https://www.youtube.com/watch?v=6x4A6Y2Lrps
(1) Abacus counting–rule of counting 2 – YouTube
https://www.youtube.com/watch?v=3incVeysmZU
(1) Cranmer Abacus–Rules of Setting 3- great tricks to learn math fast – YouTube
https://www.youtube.com/watch?v=rZKgj0YvjnE
(25) Cranmer Abacus–rules of counting by 4 – YouTube
https://www.youtube.com/watch?v=2jgKS4NrdNQ
(25) Cranmer Abacus- Rule of 5 and addiing #1-5 double and triple digits – YouTube
https://www.youtube.com/watch?v=sSvHgJbj4SU
(25) Cranmer Abacus-Subtraction using the rules of 1-5 – YouTube
https://www.youtube.com/watch?v=epsdqQK8kAk