Step-by-step solutions to odd-numbered problems from dozens of pre-algebra textbooks.
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Hotmath
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6th grade math knowledge map info
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StudyStack
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In this video, Salman Khan of Khan Academy demonstrates the Greatest Common Divisor.
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Khan Academy
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This activity takes students through the process of making a factor tree for one or two numbers. If the two numbers option is selected, the student is also guided to find their LCM and GCF. The program allows the student to check answers each step of the way.
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Math Playground
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A step-by-step method to using prime factorization to find the Least Common Multiple.
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Factoring - Least Common Multiple from Math.com
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A step-by-step description of how to use the prime factorization method to find the greatest common factor.
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Factoring - Greatest Common Factor on Math.com
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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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In this video, Salman Khan of Khan Academy demonstrates the Least Common Multiple.
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Khan Academy
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Questions and answers from experts.
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Ask Dr. Math
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