You'd be surprised how many kids have no idea how to convert units or where to get that information. This website allows you to enter a value of one unit and it will tell you the value in another unit.
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World Wide Metric
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An explanation of "how to" with several different computational areas followed by interactive practice that gives immediate feedback and assesses answers.
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Math Playground
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Explains, with examples, how to calculate percent increase and percent decrease. Includes a video of examples.
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Online Math Learning
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This page gives a very thorough lesson, with examples, of how to solve a math problem that concerns the percent of increase or decrease.
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The Math Page
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AAA Math features a comprehensive set of interactive arithmetic lessons. Unlimited practice is available on each topic which allows thorough mastery of the concepts. A wide range of lessons (Kindergarten through Eighth grade level) enables learning or review to occur at each individual's current level.
Immediate feedback prevents practicing and learning incorrect methods, which is a common result of traditional homework and worksheets. Practice can continue as long as desired in a non-threatening format which helps build self-esteem and confidence.
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AAA math
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Step-by-step solutions to odd-numbered problems from dozens of middle school math textbooks.
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Hotmath
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Flashcards from StudyStack.com.
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StudyStack
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In this video, Salman Khan of Khan Academy solves another ratio problem.
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Khan Academy
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In this video, Salman Khan of Khan Academy demonstrates ordering numeric expressions.
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Khan Academy
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In this video, Salman Khan of Khan Academy gives an introduction to percent and decimals.
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Khan Academy
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