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    Speed math subtraction & division by Jensen, Paz A. Lacsamana-

    Published 2006
    Book
  4. 4

    Subtracting by Patilla, Peter

    Published 1990
    Book
  5. 5

    Addition and subtraction a cognitive perspective

    Published 1982
    Book
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    Subtraction drill for levels 1-3 by Mock, Valerie E.

    Published 1982
    Book
  7. 7

    Subtraction by Jones, Graham

    Published 1980
    Book
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