9又2000/2001×1949(简便计算)1/4÷[(1/4+11/20)×3/4+0.05]

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9又2000/2001×1949(简便计算)1/4÷[(1/4+11/20)×3/4+0.05]9又2000/2001×1949(简便计算)1/4÷[(1/4+11/20)×3/4+0.05]9又20

9又2000/2001×1949(简便计算)1/4÷[(1/4+11/20)×3/4+0.05]
9又2000/2001×1949(简便计算)
1/4÷[(1/4+11/20)×3/4+0.05]

9又2000/2001×1949(简便计算)1/4÷[(1/4+11/20)×3/4+0.05]
9又2000/2001×1949
=(10-1/2001)×1949
=10×1949-1949/2001
=19490-1949/2001
=19489+(2001/2001-1949/2001)
=19489+52/2001
=19489又52/2001
1/4÷[(1/4+11/20)×3/4+0.05]
=1/4÷(1/4×3/4+11/20×3/4+1/20)
=1/4÷(3/16+33/80+1/20)
=1/4÷(15/80+33/80+4/80)
=1/4÷52/80
=1/4÷13/20
=1/4×20/13
=5/13
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您好:

9又2000/2001×1949
=(10-1/2001)x1949
=10x1949-1/2001x1949
=19490-1949/2001
=19489又52/2001


1/4÷[(1/4+11/20)×3/4+0.05]
=1/4÷(3/4x3/4+1/20)
=1/4÷(9/16...

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您好:

9又2000/2001×1949
=(10-1/2001)x1949
=10x1949-1/2001x1949
=19490-1949/2001
=19489又52/2001


1/4÷[(1/4+11/20)×3/4+0.05]
=1/4÷(3/4x3/4+1/20)
=1/4÷(9/16+1/20)
=1/4÷(45/80+4/80)
=1/4÷49/80
=20/49


不明白,可以追问
如有帮助,记得采纳,谢谢
祝学习进步!

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解: 9又2000/2001×1949
=(10-1/2001)×1949
=10×1949-1/2001×1949
=19490-1949/2001
=19489又2001分之52

1/4÷[(1/4+11/20)×3/4+0.05]
=1/4÷[(5/20+11/20)x3/4+0.05]
=1/4÷(4/5×...

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解: 9又2000/2001×1949
=(10-1/2001)×1949
=10×1949-1/2001×1949
=19490-1949/2001
=19489又2001分之52

1/4÷[(1/4+11/20)×3/4+0.05]
=1/4÷[(5/20+11/20)x3/4+0.05]
=1/4÷(4/5×3/4+0.05)
=1/4÷(3/5+0.05)
=1/4÷0.65
=0.25÷0.65
=25/65
=5/13
祝你学习进步,如有不明可以追问.同意我的答案请采纳,O(∩_∩)O谢谢

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第一:
(9+2000/2001)*1949
=(10-1/2001)*1949
=19490-1949/2001
=19489+(2001/2001-1949/2001)
=19489又52/2001
第二:
=1/4÷[(5/20+11/20)×3/4+1/20]
=1/4÷(16/20×3/4+1/20)
=1/4÷(12/20+1/20)
=1/4÷13/20
=1/4×20/13
=5/13