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*8)-arctan(0.01*8)-arctan(8/0.375)-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*8)-arctan(0.01*8)-arctan(8/0.375)-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61)
        =-90-arctan0.8-arctan(0.01*8)-arctan(8/0.375)-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61)
        =-90-arctan0.8-arctan0.08-arctan(8/0.375)-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61)
        =-90-arctan0.8-arctan0.08-arctan21.333333-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61)
        =-90-arctan0.8-arctan0.08-arctan21.333333-arctan0.094284+arctan(8/3)+arctan(8/10.61)
        =-90-arctan0.8-arctan0.08-arctan21.333333-arctan0.094284+arctan2.666667+arctan(8/10.61)
        =-90-arctan0.8-arctan0.08-arctan21.333333-arctan0.094284+arctan2.666667+arctan0.754006
        =-90-0.674741-arctan0.08-arctan21.333333-arctan0.094284+arctan2.666667+arctan0.754006
        =-90-0.674741-0.07983-arctan21.333333-arctan0.094284+arctan2.666667+arctan0.754006
        =-90-0.674741-0.07983-1.523956-arctan0.094284+arctan2.666667+arctan0.754006
        =-90-0.674741-0.07983-1.523956-0.094006+arctan2.666667+arctan0.754006
        =-90-0.674741-0.07983-1.523956-0.094006+1.212026+arctan0.754006
        =-90-0.674741-0.07983-1.523956-0.094006+1.212026+0.64606
        =-90.674741-0.07983-1.523956-0.094006+1.212026+0.64606
        =-90.754571-1.523956-0.094006+1.212026+0.64606
        =-92.278527-0.094006+1.212026+0.64606
        =-92.372533+1.212026+0.64606
        =-91.160507+0.64606
        =-90.514447
    答案:-90-arctan(0.1*8)-arctan(0.01*8)-arctan(8/0.375)-arctan(8/84.85)+arctan(8/3)+arctan(8/10.61)=-90.514447
    注：弧度制

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