一根电线长9米,如果用去5分之1米,还剩（ ）米,如果用去5分之1,还剩( )米?
一根电线长9米,如果用去5分之1米,还剩（ ）米,如果用去5分之1,还剩( )米?
求秒啊
求秒啊
数学人气：261 ℃时间：2019-12-20 09:52:17
优质解答
1米分成9个1米的（1米是100厘米）用去5分之一就是20厘米 9个20厘米就是180厘米=1米80厘米所以是9-1.8=7.2米
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