Multiply By Lines: Why It Works

This video explains why multiplying by lines works mathematically, starting from basic examples and building up to two digit multiplication. The summary is that multiplying by lines is a shorthand to count hundreds and thousands of dots very quickly.

First watch multiplying by lines:    • How To Multiply Numbers And Algebra Equati...  

Also see advanced examples:    • Multiplying By Lines (Advanced Examples)  

Get the book: "Multiply Numbers By Drawing Lines." This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. https://www.amazon.com/gp/product/150...

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My Books

"The Joy of Game Theory" shows how you can use math to out-think your competition. (rated 4/5 stars on 23 reviews) https://www.amazon.com/gp/product/150...

"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 1 review) https://www.amazon.com/gp/product/152...

"Math Puzzles Volume 1" features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.5/5 stars on 11 reviews. https://www.amazon.com/gp/product/151...

"Math Puzzles Volume 2" is a sequel book with more great problems. https://www.amazon.com/gp/product/151...

"Math Puzzles Volume 3" is the third in the series. https://www.amazon.com/gp/product/151...

"40 Paradoxes in Logic, Probability, and Game Theory" contains thought-provoking and counter-intuitive results. (rated 4.9/5 stars on 7 reviews) https://www.amazon.com/gp/product/151...

"The Best Mental Math Tricks" teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 3 reviews) https://www.amazon.com/gp/product/150...

"Multiply Numbers By Drawing Lines" This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 1 review) https://www.amazon.com/gp/product/150...