天的3分之2,修了三天后还剩多少米没修?(要做出来,谢谢!)
200-200*1/4-200*1/4*6/5-200*1/4*6/5*2/3
=200ï¼1-1/4-1/4*6/5-1/4*6/5*2/3ï¼
=200ï¼3/4-3/10-1/5ï¼
=200ï¼15/20-6/20-4/20)
=200*5/20
=50ç±³
ä¿®äºä¸å¤©åè¿å©50米没修
=200ï¼1-1/4-1/4*6/5-1/4*6/5*2/3ï¼
=200ï¼3/4-3/10-1/5ï¼
=200ï¼15/20-6/20-4/20)
=200*5/20
=50ç±³
ä¿®äºä¸å¤©åè¿å©50米没修
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第1个回答 2012-09-27
200*(1-1/4-1/4*6/5-1/4*5/6*2/3)
=200*(3/4-3/10-1/5)
=200*(3/4-1/2)
=200*1/4
=50(m)
=200*(3/4-3/10-1/5)
=200*(3/4-1/2)
=200*1/4
=50(m)
第2个回答 2012-09-16
第一天修了200X1/4=50米,第二天修了50X6/5=60米,第三天修了60X2/3=40米,所以3天后还差50米没修