8分之3加12分之1减24分之1等于多少，用简便方法计算24分子73/8+1/12-1/24=3/8+2/24-1/

24分子7

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3/8+1/12-1/24=3/8+2/24-1/24=9/24+1/24=10/24=5/12

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5/12
先通分，分母为24，即：9/24+2/24-1/24=10/24=5/12

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