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    Pythagoras Square, Elementary Pythagoras Square, Primary Subtraction Strip Board
    Pythagoras Square, ElementaryPythagoras Square, PrimarySubtraction Strip Board

    A box of tiles and board illustrating the decanomial layout.
    Elementary has no lines on control.

    A box of tiles and board illustrating the decanomial layout.
    Primary version has lines on the control.

    Subtraction Strip Board

    $235.00

    $240.00

    $62.00

    Roman Numerals, box and lesson
    Roman Numerals, box and lesson

    A lesson in the history of numbers. The set includes information sheet, rules, and 5 each of the symbols in a box.

    $44.00