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I am taking from The Official Hunter College High School Test: problem 76 on page 20. We read the following. In the expression below, each letter represents a one digit number. Where the same letter appears, it represents the same number in each case. Each distinct letter represents a different number. In order to make the equation true, what number must replace C?    AAA    AAB + ABC   2012 A great start is to decode each AAA, AAB, and ABC. It helps to look at this problem wholly; particularly we look at the leading sum on the left wall (of the same types). We glean that either: (1) A + A + A = 20, (2) A + A + A + 1 = 20 or (3) A + A + A + 2 = 20: its very important to remember that given three numbers each less than ten, the sum of them which is great, is at most 2 in the tens place. This means that each row can only donate a 1 or 2 to the next. We can conclude that our line is... read more

I thought I would give a few examples of how easy exponents are. One important thing, though. I know the big question I have heard and many others have as well, is why do I need to learn this stuff. I will probably never use it. It is true that you may not use these directly, but once your mind becomes one of the solving variety, you become indispensable to many employers. You become a problem solver! To multiply exponents, you add the exponents. Example: 3x^2 * 6x^8 = 18x^10 I hope that makes sense. Another: x^m * x^n = x^m+n In this one since the variables are different you cannot merely add them. How about we tackle Scientific Notation next. All of these methods are merely a way to display and/or manipulate very large or very small or complex numbers. Talk Tuesday!!! LD

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