练习三
模块一
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.27&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"553.27","h":"123.00","dataType":"png","c":"word/media/image1.png","imgOriW":913,"imgOriH":203})
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.00&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"553.00","h":"63.80","dataType":"png","c":"word/media/image2.png","imgOriW":875,"imgOriH":101})
![](https://wkrtcs.bdimg.com/rtcs/image?w=97.33&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"97.33","h":"857.33","dataType":"gif","c":"word/media/image3.gif"})
![](https://wkrtcs.bdimg.com/rtcs/image?w=385.27&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"385.27","h":"165.33","dataType":"png","c":"word/media/image5.png","imgOriW":602,"imgOriH":309})
4.
通过计算，我发现：__________________________________________
![](https://wkrtcs.bdimg.com/rtcs/image?w=464.07&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"464.07","h":"68.93","dataType":"png","c":"word/media/image6.png","imgOriW":532,"imgOriH":79})
5.
![](https://wkrtcs.bdimg.com/rtcs/image?w=531.67&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"531.67","h":"116.33","dataType":"png","c":"word/media/image7.png","imgOriW":681,"imgOriH":149})
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.33&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"553.33","h":"60.53","dataType":"png","c":"word/media/image8.png","imgOriW":850,"imgOriH":93})
6.
模块二
1.![](https://wkrtcs.bdimg.com/rtcs/image?w=552.80&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"552.80","h":"293.00","dataType":"png","c":"word/media/image9.png","imgOriW":1049,"imgOriH":556})
（1）根据“2个书架一共放了224本书”可以先算____________________________
（2）根据“有2个书架”和“每个书架有4层”可以先算________________________
用两种方法进行解答：
检验：
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.27&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_3","w":"553.27","h":"97.00","dataType":"png","c":"word/media/image10.png","imgOriW":827,"imgOriH":145})
2.
①根据条件_______________________________,可以求出___________________
②根据条件_______________________________，可以求出__________________
平均每班有多少本？（用两种方法解答）
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.00&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"553.00","h":"60.93","dataType":"png","c":"word/media/image11.png","imgOriW":790,"imgOriH":87})
①根据条件_______________________________,可以求出___________________
②根据条件_______________________________，可以求出__________________
平均每人植树多少棵？（用两种方法解答）
![](https://wkrtcs.bdimg.com/rtcs/image?w=982.67&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_11","w":"982.67","h":"857.33","dataType":"gif","c":"word/media/image12.gif"})
3.
这瓶药可以吃多少天？（用两种方法解答）
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.40&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"553.40","h":"58.40","dataType":"png","c":"word/media/image13.png","imgOriW":815,"imgOriH":86})
4.
5.![](https://wkrtcs.bdimg.com/rtcs/image?w=466.13&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"466.13","h":"156.67","dataType":"png","c":"word/media/image14.png","imgOriW":723,"imgOriH":243})
6. 小华、小芳和小英5天一共写了300个毛笔字，平均每人每天写多少个？
7. 四年级二班举行夹玻璃球比赛。第一组8人参加，5分钟共加了440个；第二组9人参加，5分钟共夹了450个。第一组平均每人每分钟夹多少个球？第二组呢？
模块三
1. 420÷3÷7 450÷30÷3
420÷（3×7） 450÷（30×3）
通过计算，我发现：__________________________________________
根据你的结论，自己编两道一样的计算。
_______________________ _________________________
2. 下面各题可以怎样算？与同学交流。
270÷6÷5 720÷（8×6） 210÷35
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.13&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"553.13","h":"155.33","dataType":"png","c":"word/media/image15.png","imgOriW":851,"imgOriH":239})
3.
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.40&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_5","w":"553.40","h":"50.53","dataType":"png","c":"word/media/image16.png","imgOriW":854,"imgOriH":78})
4.用两种方法解答下面各题。
![](https://wkrtcs.bdimg.com/rtcs/image?w=571.13&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"571.13","h":"62.93","dataType":"png","c":"word/media/image17.png","imgOriW":855,"imgOriH":124})
![](https://wkrtcs.bdimg.com/rtcs/image?w=552.93&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_5","w":"552.93","h":"53.53","dataType":"png","c":"word/media/image18.png","imgOriW":868,"imgOriH":84})
![](https://wkrtcs.bdimg.com/rtcs/image?w=523.60&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","w":"523.60","h":"157.27","dataType":"png","c":"word/media/image19.png","imgOriW":869,"imgOriH":261})
5.
![](https://wkrtcs.bdimg.com/rtcs/image?w=553.53&md5sum=948c285156a30dacb100f45c5e9bc5fd&sign=e681ed7c41&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=235&ipr={"t":"img","r":"r_4","w":"553.53","h":"201.13","dataType":"png","c":"word/media/image20.png","imgOriW":820,"imgOriH":298})
6.
7.一筐萝卜，需要2只小兔一起抬。4只小兔要把这筐萝卜从离家400米远的地方抬回家，平均每只兔子要抬多少米？
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