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-arctan0.1×0.8-arctan0.01×0.8-arctan(1/0.375)*0.8-arctan(1/84.85)*0.8+arctan(1/3)*0.8+arctan(1/10.61)*0.8 的值.
    题型：数学计算
    解:
          -90-arctan0.1×0.8-arctan0.01×0.8-arctan(1/0.375)*0.8-arctan(1/84.85)*0.8+arctan(1/3)*0.8+arctan(1/10.61)*0.8
        =-90-arctan0.1×0.8-arctan0.01×0.8-arctan2.666667*0.8-arctan(1/84.85)*0.8+arctan(1/3)*0.8+arctan(1/10.61)*0.8
        =-90-arctan0.1×0.8-arctan0.01×0.8-arctan2.666667*0.8-arctan0.011786*0.8+arctan(1/3)*0.8+arctan(1/10.61)*0.8
        =-90-arctan0.1×0.8-arctan0.01×0.8-arctan2.666667*0.8-arctan0.011786*0.8+arctan0.333333*0.8+arctan(1/10.61)*0.8
        =-90-arctan0.1×0.8-arctan0.01×0.8-arctan2.666667*0.8-arctan0.011786*0.8+arctan0.333333*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-arctan0.01×0.8-arctan2.666667*0.8-arctan0.011786*0.8+arctan0.333333*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-0.01×0.8-arctan2.666667*0.8-arctan0.011786*0.8+arctan0.333333*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-0.01×0.8-1.212026*0.8-arctan0.011786*0.8+arctan0.333333*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-0.01×0.8-1.212026*0.8-0.011785*0.8+arctan0.333333*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-0.01×0.8-1.212026*0.8-0.011785*0.8+0.32175*0.8+arctan0.094251*0.8
        =-90-0.099669×0.8-0.01×0.8-1.212026*0.8-0.011785*0.8+0.32175*0.8+0.093973*0.8
        =-90-0.079735-0.01×0.8-1.212026*0.8-0.011785*0.8+0.32175*0.8+0.093973*0.8
        =-90-0.079735-0.008-1.212026*0.8-0.011785*0.8+0.32175*0.8+0.093973*0.8
        =-90-0.079735-0.008-0.969621-0.011785*0.8+0.32175*0.8+0.093973*0.8
        =-90-0.079735-0.008-0.969621-0.009428+0.32175*0.8+0.093973*0.8
        =-90-0.079735-0.008-0.969621-0.009428+0.2574+0.093973*0.8
        =-90-0.079735-0.008-0.969621-0.009428+0.2574+0.075178
        =-90.079735-0.008-0.969621-0.009428+0.2574+0.075178
        =-90.087735-0.969621-0.009428+0.2574+0.075178
        =-91.057356-0.009428+0.2574+0.075178
        =-91.066784+0.2574+0.075178
        =-90.809384+0.075178
        =-90.734206
    答案:-90-arctan0.1×0.8-arctan0.01×0.8-arctan(1/0.375)*0.8-arctan(1/84.85)*0.8+arctan(1/3)*0.8+arctan(1/10.61)*0.8=-90.734206
    注：弧度制

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