题目内容
![]() ![]() | ![]() ![]() ![]() | ![]() ![]() ![]() ![]() |
![]() ![]() ![]() ![]() | ![]() ![]() ![]() ![]() | 25×3.2×125 |
(![]() ![]() ![]() | ![]() ![]() ![]() ![]() | 18÷(![]() ![]() |
32.6×33-32.6×23 | ![]() ![]() ![]() | ![]() ![]() |
解:
分析:
×
÷15=
,先把除以15转化为乘
;横着看第二个先算加
,再算减法;第3个-第5个,根据运算顺序计算;第6个把3.2分成4×0.8,再用乘法分配律分别计算,然后相乘;第7-9个根据运算顺序计算;第十个利用乘法分配律提取32.6,然后计算;第11个,根据运算顺序计算;第12个,运用乘法分配律提取
,再计算.
点评:此题是对基础知识的掌握情况,做题时应看清数字,确定运算顺序,正确的进行解答.
![]() ![]() = ![]() ![]() ![]() = ![]() | ![]() ![]() ![]() = ![]() ![]() ![]() = ![]() | ![]() ![]() ![]() ![]() = ![]() ![]() ![]() ![]() = ![]() |
![]() ![]() ![]() ![]() = ![]() ![]() ![]() = ![]() | ![]() ![]() ![]() ![]() = ![]() ![]() = ![]() | 25×3.2×125 =(25×4)×(8×125) =10000; |
(![]() ![]() ![]() =( ![]() ![]() ![]() =2; | ![]() ![]() ![]() ![]() = ![]() ![]() ![]() = ![]() | 18÷(![]() ![]() =18÷ ![]() =108; |
32.6×33-32.6×23 =32.6×(33-23) =326; | ![]() ![]() ![]() = ![]() ![]() ![]() ![]() = ![]() | ![]() ![]() = ![]() =16. |
分析:
![](http://thumb.1010pic.com/pic5/latex/729.png)
![](http://thumb.1010pic.com/pic5/latex/2520.png)
![](http://thumb.1010pic.com/pic5/latex/6235.png)
![](http://thumb.1010pic.com/pic5/latex/2132.png)
![](http://thumb.1010pic.com/pic5/latex/927.png)
![](http://thumb.1010pic.com/pic5/latex/5140.png)
点评:此题是对基础知识的掌握情况,做题时应看清数字,确定运算顺序,正确的进行解答.
![](http://thumb2018.1010pic.com/images/loading.gif)
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