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  • 1. 用简便方法计算。                                                             

    1. (1) 25×32+25×48                                                       
    2. (2) 27×99+27                                                           
    3. (3) 36×99                                                              
    4. (4) 18×26+83×26-26                                                           
    5. (5) 57×99+57                                                   
    6. (6) 103×87

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