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Alternative Arithmetic Methods (I think these are easier ways to add, multiply, etc.) Fun Math Videos Moebius (Mobius) Strip: Discover how to make a Moebius strip, as well as some very cool things about it: http://youtu.be/1xKiSSVY5bI Multiply by 5 the easy way even when you have decimals: http://www.youtube.com/watch?v=2wPAo5YAEfI Scratch Addition: Quick and easy way to add a column of single digit numbers using the Scratch or Dot Method. http://youtu.be/aobn006_rl0 Multiply by 9 the easy way: multiply single digits by 9, and larger numbers when all the digits are the same, like 88888 x 9 http://www.youtube.com/watch?v=VFHDn4TKHDMNumerals: About Hindu-Arabic numerals and/or the Indian numerals. I do not know the exact origins. http://www.youtube.com/watch?v=bwQpCJroCac Squaring numbers whose digits are all ones like 11 x 11 or 11111 x 11111, etc. Show your friends! http://www.youtube.com/watch?v=xTffv1lpwGg |