admin百科知識 2022-02-13 0:05:50 613乘512加712乘513簡便方法計算6/13乘5/12加7/12乘5/13簡便方法計算網友廻答:匿名網友6/13×5/12 7/12×5/13= (6×5 7×5)/(13×12)= [5×(6 7)]/(13×12)= (5×13)/(13×12)= 5/12 db標簽 生活常識_百科知識_各類知識大全»613乘512加712乘513簡便方法計算
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