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 20*19*18*17*16*15*14*13*12*11*10*9/(12*11*10*9*8*7*6*5*4*3*2)*(0.7)^12*0.3^8 的值.
    题型：数学计算
    解:
          20*19*18*17*16*15*14*13*12*11*10*9/(12*11*10*9*8*7*6*5*4*3*2)*(0.7)^12*0.3^8
        =20*19*18*17*16*15*14*13*12*11*10*9/479001600*(0.7)^12*0.3^8
        =20*19*18*17*16*15*14*13*12*11*10*9/479001600*0.7^12*0.3^8
        =20*19*18*17*16*15*14*13*12*11*10*9/479001600*0.013841287201*0.3^8
        =20*19*18*17*16*15*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =380*18*17*16*15*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =6840*17*16*15*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =116280*16*15*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =1860480*15*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =27907200*14*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =390700800*13*12*11*10*9/479001600*0.013841287201*0.00006561
        =5079110400*12*11*10*9/479001600*0.013841287201*0.00006561
        =60949324800*11*10*9/479001600*0.013841287201*0.00006561
        =670442572800*10*9/479001600*0.013841287201*0.00006561
        =6704425728000*9/479001600*0.013841287201*0.00006561
        =60339831552000/479001600*0.013841287201*0.00006561
        =125970*0.013841287201*0.00006561
        =1743.586949*0.00006561
        =0.114397
    答案:20*19*18*17*16*15*14*13*12*11*10*9/(12*11*10*9*8*7*6*5*4*3*2)*(0.7)^12*0.3^8=0.114397

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