Multiply Up to 20X20 In Your Head Tricks for 2011

In just FIVE outline you must learn to promptly multiply up to 20×20 in your head. With this ploy, you will be able to multiply any two numbers from 11 to 19 in your head promptly, without the use of a calculator. I will take upon yourself that you know your multiplication table practically well up to 10×10. Try this: Take 15 x 13 for an develop. Always place the larger digit of the two on top in your mind. Then draw the shape of Africa mentally so it covers the 15 and the 3 from the 13 below. Persons covered numbers are all you need. First add 15 + 3 = 18 Add a zero in the rear it (multiply by 10) to get 180. Multiply the covered lower 3 x the release digit above it the “5″ (3×5= 15) Add 180 + 15 = 195.

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