Multiplication SECRET NUMBERS

Learning math means learning about the numbers that sometimes boring because it involves a variety of logic. This paper is a series of secret numbers. By using certain techniques to be very fun math. Impose something on students learning the material without an interesting technique to make students will increasingly resent the lessons that we give. Keep in mind that every student does not have the ability and the same desire when they enter into the mathematics classroom. Like a salesman you should be able to offer material that we gave at that time so that students become like, buy, even addicted to the products provided subjects. They will be pleased to enter into our class, they become even miss math class.
1. Multiplication By Step (Klang) 1 Figures In this meeting I will give a very interesting experience. I am not Merkipun math teacher could not hurt to pass and we need to learn together. This time we will discuss how the multiplication of two numbers with a certain interval. Usually someone more memorized the multiplication of numbers as 9 x 9 = 81, 11 x 11 = 121, 20 x 20 = 400 and so on. While someone multiplying 8 x 10 will be thinking for a moment, when multiplying 21 x 23 as well so then someone will frowned. Moreover, would multiply 15 x 19 will be more difficult. With certain techniques it can be in memermudah we teach students. Frankly I read this solution in the book free math and human peradapan is my child reading a book to be quite good at the abacus. Frankly I lost him. But I found myself modifications, these are the development of my own doing. Thus be more varied even more amazing. I myself had a smile myself how come ya? Now we start from a simple: 8 x 10 = 92 - 1 = 81 - 1 = 80 to remember 92 something easy and in less than  1 11 x 13 = 122 - 1 = 144-1 = 143, since 112 would be easier than 10 Now we try a larger 23 x 25 = 242 to 1 = 576 to 1 = 575 Try your All other 7 x 9 = .... 5 x 7 = .... 19 x 21 = .... Ha Ha Ha Very Easy ...
Now if the product is  3 digits klang For example 11 x 15 = ... .. ? 7 x 11 = .... ?
The key to take the middle number, how to complete this 7 x 11 at the center was the number 7 8 9 10 11 taking the number 9 is 7 x 11 = 92 to 22 = 81 - 4 = 77 11 x 15 took center from 132 - 2^2 = 169 - 4 = 165 24 x 28 = 262 - 2^2 = 676 - 4 = 672 Its okey, Good Trying all this is the exciting thing. Greetings from Us at Banyuasin. Go on education in Indonesia, I will continue on another occasion with the more interesting.

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