NT$50.00
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The Black and White Bead Stairs are used for addition and subtraction.
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HIERARCHICAL TRINOMIAL CUBE
NUMBERS AND COUNTERS
NUMBER RODS
TRINOMIAL CUBE
LARGE WOODEN NUMBER CARDS 1-9000
HUNDRED BOARD
TENS BOARDS
PYTHAGORAS BOARD
POWER OF TWO CUBE
INTRODUCTION TO DECIMAL SYMBOL
SMALL WOODEN NUMBER CARDS 1-9000
INTRODUCTION TO DECIMAL QUANTITY
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