Montessori Mathematics Material - 4 Sets 1-9 Beads Stair, 10 Pieces Ten Beads Bar Material: Plastic beads, metal wire Color: Multi-colored Includes: 10 pieces ten beads bar, 4 sets 1-9 beads stair(4 pieces for each number) Used in a number of mathematical activities to help kids to understand the decimal system: addition, subtraction, multiplication, division
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