Definition:
Rectangular rods of different sizes (from 1 to 10 centimeters) with corresponding colors (for example, the 1 cm rod is white, the 2 cm rod is red), used in mathematics instruction.
Type of Speech:
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Rectangular rods of different sizes (from 1 to 10 centimeters) with corresponding colors (for example, the 1 cm rod is white, the 2 cm rod is red), used in mathematics instruction.