解3/5-1/12+2/5-7/12
=3/5+2/5-1/12-7/12
=1-（1/12+7/12）
=1-8/12
=1-2/3
=1/3
3/5-1/12+2/5-7/12分?jǐn)?shù)簡便計算
3/5-1/12+2/5-7/12分?jǐn)?shù)簡便計算
數(shù)學(xué)人氣：738 ℃時間：2020-04-19 15:30:55
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