( / 20)= 0.8 =(5 / )= 16 ÷( ) = (30 / )
( / 20)= 0.8 =(5 / )= 16 ÷( ) = (30 / )
其他人气:858 ℃时间:2020-04-23 09:19:05
优质解答
16/20=0.8=5/(25/4)=16/20=30/(150/4)
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