This video demonstrates, without narration, a trick to multiplying large numbers. To do the trick, just draw a diagonal line for every unit in the number and add up the number of times the lines cross.
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2 Comments
thats all fine and well if you multiply equal ammounts of numbers. now what if they are different, say 569 x 73? it doesnt form the same type of grid and i am lost as to which crossing places you add up.
dont get weird
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