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Tutorials from James Porter

4 videos · 84K views

How to use a 100 bead abacus-Single Digit Addition

James Porter45K views

How to use a 100 bead abacus-Adding Double Digit Numbers

James Porter21K views

How to use a 100 bead abacus-Single Digit Multiplication

James Porter9.9K views

How to use a 100 bead abacus-Double Digit Multiplication

James Porter7.4K views

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