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    Pythagoras Square, Elementary Pythagoras Square, Primary
    Pythagoras Square, ElementaryPythagoras Square, PrimaryPythagoras Square Replacements

    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.

    Please designate what color and size you need in the "Special Instructions" section of the Order Form.

    $254.00

    $259.00

    $4.00

    Subtraction Strip Board Roman Numerals, box and lesson
    Subtraction Strip BoardRoman Numerals, box and lesson

    Subtraction Strip Board

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

    $67.00

    $52.00