题目内容
阅读下面解题过程:
计算:![](http://thumb.1010pic.com/pic1/upload/papers/c02/20110804/201108041322452341430.gif)
解:
=
……………………………………………………………①
=5÷(-25)………………………………………………………………②
=
…………………………………………………………………………③
回答:(1)上面解题过程中有两处错误,第一处是第_________________步,
错因是______________,第二处是_______________,错因是______________。
(2)正确结果应是_______________________。
计算:
![](http://thumb.1010pic.com/pic1/upload/papers/c02/20110804/201108041322452341430.gif)
解:
![](http://thumb.1010pic.com/pic1/upload/papers/c02/20110804/201108041322452501445.gif)
=
![](http://thumb.1010pic.com/pic1/upload/papers/c02/20110804/201108041322452811333.gif)
=5÷(-25)………………………………………………………………②
=
![](http://thumb.1010pic.com/pic1/upload/papers/c02/20110804/20110804132245296914.gif)
回答:(1)上面解题过程中有两处错误,第一处是第_________________步,
错因是______________,第二处是_______________,错因是______________。
(2)正确结果应是_______________________。
解:“略”。
![](http://thumb2018.1010pic.com/images/loading.gif)
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