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数学
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1减9分之七除以8分之七怎样简算
人气:349 ℃ 时间:2019-10-27 00:24:20
解答
1减9分之七除以8分之七
=1-(9/7÷7)÷(7/8÷7)
=1-1/9÷1/8
=1-8/9
=1/9
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