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 (29.1^2-25.2^2)×(3.14+25.2^2×3.14×3.9+(3.14×(75.3/2)×(65.3/2)-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9) 的值.
    题型：数学计算
    解:
          (29.1^2-25.2^2)×(3.14+25.2^2×3.14×3.9+(3.14×(75.3/2)×(65.3/2)-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+(3.14×(75.3/2)×(65.3/2)-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+(3.14×37.65×(65.3/2)-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+(3.14×37.65×32.65-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+(3.14×37.65×32.65-2×(50.8/2×30.4)-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+(3.14×37.65×32.65-2×772.16-6×7×7×2)×280/360×2+6×7×7×2×3.9)
        =211.77×(3.14+25.2^2×3.14×3.9+1727.59565×280/360×2+6×7×7×2×3.9)
        =211.77×12760.410852
        =2702272.206128
    答案:(29.1^2-25.2^2)×(3.14+25.2^2×3.14×3.9+(3.14×(75.3/2)×(65.3/2)-2×(50.8/2×(60.8/2))-6×7×7×2)×280/360×2+6×7×7×2×3.9)=2702272.206128

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