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    Secrets of Mental Math - The Great Courses. 2 DVDs + Book. New Sealed

    • Item No : 197003172322
    • Condition : Brand New
    • Brand : No brand Info
    • Seller : cactimom
    • Current Bid : US $25.00

    • * Item Description

    • 2 DVDs + Book. New Sealed. In fact, it's an ability you already have—you just may not know it. Performing calculations in your head is all just a process of breaking down a large problem into simpler and simpler problems until it's finally reduced to a single answer.
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