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[QUOTE]Originally posted by PCola77: [QB] No offense dude, but I don't think that's a very good "trick. Just multiplying them out in two pieces makes it a lot easier. E.g., 11 x any number is the same as (10 + 1)*x which you can commute to 10x +1x. So to multiply by 11 you move the decimal one point to the right, then add the original number 11 x 425 = 10 x 425 + 425 = 4250 + 425 = 4675 Doesn't that seem much more intuitive than adding two numbers, carrying one to the left, etc? In your example, doesn't 570+57 seem easier to do then try to remember which numbers are on the ends and in the middle and which gets carried over? Mayeb we should get the Munchkin man to weigh in, didn't he claim to be a math teacher? :D [QUOTE]Originally posted by Ace of Spades: [qb] ACE of SPADES is a math expert! :cool: But I don't like to brag :p I used to know a buch of cool math tricks.... Like 11 times tables add the numbers and put that int he middle EXAMPLE 23 x 11....2 plus five, put in middle = 253...if the number is more than ten put the second number in the middle and carry number to left... 57 x 11....5 + 7 = 12....put 2 in middle carry 1 to left = 627 [/qb][/QUOTE] [/QB][/QUOTE]
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