总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 2.55*8.4+6.396*(0.6+1.2)*8.4*(8.1+8.4)*0.5*0.5 的值.
    题型：数学计算
    解:
          2.55*8.4+6.396*(0.6+1.2)*8.4*(8.1+8.4)*0.5*0.5
        =2.55*8.4+6.396*1.8*8.4*(8.1+8.4)*0.5*0.5
        =2.55*8.4+6.396*1.8*8.4*16.5*0.5*0.5
        =21.42+6.396*1.8*8.4*16.5*0.5*0.5
        =21.42+11.5128*8.4*16.5*0.5*0.5
        =21.42+96.70752*16.5*0.5*0.5
        =21.42+1595.67408*0.5*0.5
        =21.42+797.83704*0.5
        =21.42+398.91852
        =420.33852
    答案:2.55*8.4+6.396*(0.6+1.2)*8.4*(8.1+8.4)*0.5*0.5=420.33852

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