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Pre-Algebra: Subtracting Integers

http://www.mindbites.com/lesson/1261-pre-algebra-subtracting-integers To subtract integers, you can simply add the opposite. In a previous lesson, Professor Burger taught us how to add integers, and in this lesson he will show how subtracting two integers is the same as adding the integers with the opposite sign. For example, 10-14 is equal to 10 + (-14). If the number being subtracted is less than the the number it is being subtracted from, the answer will be positive. If the number being subtracted is greater, the answer will be negative. Taught by Professor Edward Burger, this lesson was selected from a broader, comprehensive course, Pre Algebra. This course and others are available from Thinkwell, Inc. The full course can be found at http://www.thinkwell.com/student/product/prealgebra. The full course covers whole numbers, integers, fractions and decimals, variables, expressions, equations and a variety of other pre algebra topics. Founded in 1997, Thinkwell has succeeded in creating a "next-generation" textbook, one that helps students learn and teachers teach. Capitalizing on the power of new technology, Thinkwell products prepare students more effectively for their coursework than any printed textbook can. Thinkwell has assembled a group of talented industry professionals who have shaped the company into the leading provider of technology-based textbooks. For more information about Thinkwell, please visit www.thinkwell.com.
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