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Different multiplication strategies

I’m investigation possible models for learning multiplication. Below there are 7 possible models or algorithms. I’d like to know if you know of more models. I’ve found 12 different models for understanding/doing multiplication over at Natural Math, but have not found explanations of all of these that I can easily share.

Interestingly enough, many of these videos define multiplication at the beginning of the video with no sense that there are other possible definitions.

 

Binary multiplication

Line Multiplication

Lattice Multiplication

Area model

Repeated addition

Using arrays

Chip model

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