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指尖陀螺数学教具(乘除法1-9)math facts fidget spinners
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最近流行的指尖陀螺数学教具,正面为乘法,反面为除法,两面互为答案
Recently, the popular fidget spinner math teaching aid, the front side is multiplication, the back side is division, and the two sides are the answers to each other
Design by 火宅 on MakerWorld (license: BY-SA).