計算下面各題,并用乘法的交換律驗算。
(1)      156            驗算:
         ×    35        
   
(2)      208             驗算:
         ×    44 
    
計算下面各題,并用乘法的交換律驗算。
(1)      156            驗算:         35
         ×    35                        ×  156  
               780                              210
              468                              175
              5460                             35     
                                                  5460
(2)      208             驗算:        44
         ×    44                        ×   208  
               832                              352
              832                             88        
              9152                            9152
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