abacus – Dr Denise M Robinson

Cranmer Abacus Using rules 1-5 to add quickly – YouTube

Cranmer Abacus–learn the rules to subtract by 1 – YouTube

Cranmer Abacus–learn the rules to subtract by 2 – YouTube

Cranmer Abacus for Math-introduction and begin adding – YouTube

(1) Abacus counting–rule of counting 2 – YouTube

(1) Cranmer Abacus–Rules of Setting 3- great tricks to learn math fast – YouTube

(25) Cranmer Abacus–rules of counting by 4 – YouTube

(25) Cranmer Abacus- Rule of 5 and addiing #1-5 double and triple digits – YouTube

(25) Cranmer Abacus-Subtraction using the rules of 1-5 – YouTube

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