1-( )=5/7 2-( )-1/17=5/17(括号写分数)
1-( )=5/7 2-( )-1/17=5/17(括号写分数)
其他人气:552 ℃时间:2019-12-24 14:10:52
优质解答
1-(2/7 )=5/7 2-(11/17 )-1/17=5/17
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