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  • 1. 根据乘法运算定律填空。                                  

    1. (1)  88×45=×                                      
    2. (2) (a×b)×c=a×(×)                                            
    3. (3) 8×7×125=×(×)                                     
    4. (4) (36+36+36+36)×25=36×(×)                                   

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