201.1
![](http://thumb.1010pic.com/pic5/latex/217086.png)
1.15
![](http://thumb.1010pic.com/pic5/latex/1047.png)
30500
![](http://thumb.1010pic.com/pic5/latex/7.png)
59
![](http://thumb.1010pic.com/pic5/latex/8.png)
分析:①0.34×201.1改写成34×2.011然后用乘法的分配律进行计算;
②先把4
![](http://thumb.1010pic.com/pic5/latex/205715.png)
转化成
![](http://thumb.1010pic.com/pic5/latex/217087.png)
再乘以
![](http://thumb.1010pic.com/pic5/latex/4721.png)
;
③运用小数的除法进行计算;
④把式子转化成(3.6×
![](http://thumb.1010pic.com/pic5/latex/365.png)
×1.2)×
![](http://thumb.1010pic.com/pic5/latex/217088.png)
进行约分化简可得结果;
⑤先计算4270÷14得到305,然后运用乘法分配律进行计算;
⑥因为58.3÷3除不尽所以把它转化成
![](http://thumb.1010pic.com/pic5/latex/217089.png)
,100=
![](http://thumb.1010pic.com/pic5/latex/217090.png)
,6×13.4=
![](http://thumb.1010pic.com/pic5/latex/217091.png)
根据同分母分数的加减法进行计算.
⑦用2×5×7分别与
![](http://thumb.1010pic.com/pic5/latex/13.png)
、
![](http://thumb.1010pic.com/pic5/latex/36.png)
、
![](http://thumb.1010pic.com/pic5/latex/847.png)
相乘,把所得的积相加.
⑧先计算分子1+3+…+1005=(1+1005)×(1005+1)÷2=1006×1006÷2=1006×503,分母1007+1009+…2011=(1007+2011)×(2011+1)÷2÷2=3018×503,由此可得
![](http://thumb.1010pic.com/pic5/latex/217092.png)
=
![](http://thumb.1010pic.com/pic5/latex/8.png)
.
解答:①66×2.011+0.34×201.1=201.1;
②4
![](http://thumb.1010pic.com/pic5/latex/205715.png)
÷18=
![](http://thumb.1010pic.com/pic5/latex/217086.png)
;
③0.805÷0.7=1.15;
④(3.6×
![](http://thumb.1010pic.com/pic5/latex/365.png)
×1.2)÷(1×2.4×0.18)=
![](http://thumb.1010pic.com/pic5/latex/1047.png)
;
⑤4270÷14+305×99=30500;
⑥100-58.3÷3-6×13.4=
![](http://thumb.1010pic.com/pic5/latex/7.png)
;
⑦(2×5×7)×(
![](http://thumb.1010pic.com/pic5/latex/217084.png)
)=59;
⑧
![](http://thumb.1010pic.com/pic5/latex/217085.png)
=
![](http://thumb.1010pic.com/pic5/latex/8.png)
;
故答案为:①201.1,②
![](http://thumb.1010pic.com/pic5/latex/217093.png)
,③1.15,④
![](http://thumb.1010pic.com/pic5/latex/1047.png)
,⑤30500,⑥
![](http://thumb.1010pic.com/pic5/latex/7.png)
,⑦59,⑧
![](http://thumb.1010pic.com/pic5/latex/8.png)
.
点评:本组题目考查的知识面比较广泛,有乘法的分配律的运用,分数小数的乘除法,数的简便运算等知识点.