问几道问题? 用简便方法计算............
(1)5.674×37.5+375×0.4326(4)20052005÷20042004(6)(1+13/1+14/1)×(13/1+14/1+15/1)-(1+13/1...
(1)5.674×37.5+375×0.4326
(4)20052005÷20042004
(6)(1+13 /1+14 /1)×(13 /1+14/1 + 15/1 )-(1+ 13/1 +14/1 + 15/1 )×(13/1 ×14/1 )
(8)1992×20052005-2005×19921992
(9)38×999
(10)578×1001 展开
(4)20052005÷20042004
(6)(1+13 /1+14 /1)×(13 /1+14/1 + 15/1 )-(1+ 13/1 +14/1 + 15/1 )×(13/1 ×14/1 )
(8)1992×20052005-2005×19921992
(9)38×999
(10)578×1001 展开
2个回答
展开全部
(1)5.674×37.5+375×0.4326
=5.674×37.5+(375÷10)*(0.4326*10)
=5.674×37.5+37.5*4.326
=37.5*(5.674+4.326)
=37.5*10
=375.
(2)20052005÷20042004
=2005*10001/2004*10001
=2005/2004
(8)1992×20052005-2005×19921992
=1992*2005*10001-2005*1992*10001
=0
(9)38×999
=38*(1000-1)
=38*1000-38
=……
(10)578*1001
=578*(1000+1)
=578*1000+578
=……
(6)不晓得
=5.674×37.5+(375÷10)*(0.4326*10)
=5.674×37.5+37.5*4.326
=37.5*(5.674+4.326)
=37.5*10
=375.
(2)20052005÷20042004
=2005*10001/2004*10001
=2005/2004
(8)1992×20052005-2005×19921992
=1992*2005*10001-2005*1992*10001
=0
(9)38×999
=38*(1000-1)
=38*1000-38
=……
(10)578*1001
=578*(1000+1)
=578*1000+578
=……
(6)不晓得
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询