一根绸带长4/5米,用去2/3,还剩多少米?若用去2/3米,还剩多少米?

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一根绸带长4/5米,用去2/3,还剩多少米?若用去2/3米,还剩多少米?

一根绸带长4/5米,用去2/3,还剩多少米?若用去2/3米,还剩多少米?
一根绸带长4/5米,用去2/3,还剩多少米?若用去2/3米,还剩多少米?

一根绸带长4/5米,用去2/3,还剩多少米?若用去2/3米,还剩多少米?
一根绸带长4/5米,用去2/3,还剩4/5×(1-2/3)=4/15米
若用去2/3米,还剩4/5-2/3=2/15米

4/5×(1-2/3)=4/15米
4/5-2/3=2/15米

一根绸带长4/5米,用去2/3,还剩多少米?
4/5×(1-2/3)=4/15(米)
若用去2/3米,还剩多少米?
4/5-2/3=2/15(米)