Special Products
978-613-6-42479-8
6136424797
160
2011-07-18
49.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematics, special products are of the form: (a+b)(a-b) = a2 - b2 (Product of sum and difference of two terms) which can be used to quickly solve multiplication such as: 301 * 299 = (300 +1)(300-1) = 3002 - 12 = 90000 - 1 = 89999 . Multiplication (often denoted by the cross symbol "×") is the mathematical operation of scaling one number by another. It is one of the four basic operations in elementary arithmetic (the others being addition, subtraction and division).
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数学
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