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 -90-arctan(0.1*250)-arctan(0.01*250)-arctan(250/0.375)-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*250)-arctan(0.01*250)-arctan(250/0.375)-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61)
        =-90-arctan25-arctan(0.01*250)-arctan(250/0.375)-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61)
        =-90-arctan25-arctan2.5-arctan(250/0.375)-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61)
        =-90-arctan25-arctan2.5-arctan666.666667-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61)
        =-90-arctan25-arctan2.5-arctan666.666667-arctan2.946376+arctan(250/3)+arctan(250/10.61)
        =-90-arctan25-arctan2.5-arctan666.666667-arctan2.946376+arctan83.333333+arctan(250/10.61)
        =-90-arctan25-arctan2.5-arctan666.666667-arctan2.946376+arctan83.333333+arctan23.562677
        =-90-1.530818-arctan2.5-arctan666.666667-arctan2.946376+arctan83.333333+arctan23.562677
        =-90-1.530818-1.19029-arctan666.666667-arctan2.946376+arctan83.333333+arctan23.562677
        =-90-1.530818-1.19029-1.569296-arctan2.946376+arctan83.333333+arctan23.562677
        =-90-1.530818-1.19029-1.569296-1.243596+arctan83.333333+arctan23.562677
        =-90-1.530818-1.19029-1.569296-1.243596+1.558797+arctan23.562677
        =-90-1.530818-1.19029-1.569296-1.243596+1.558797+1.528382
        =-91.530818-1.19029-1.569296-1.243596+1.558797+1.528382
        =-92.721108-1.569296-1.243596+1.558797+1.528382
        =-94.290404-1.243596+1.558797+1.528382
        =-95.534+1.558797+1.528382
        =-93.975203+1.528382
        =-92.446821
    答案:-90-arctan(0.1*250)-arctan(0.01*250)-arctan(250/0.375)-arctan(250/84.85)+arctan(250/3)+arctan(250/10.61)=-92.446821
    注：弧度制

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